Prepare open source release (#9)

* Add 3rd party licenses

* Add LICENSE

* Add file headers

* Add code of conduct

* Add bug report template

* Add a feature request template

* Add CONTRIBUTING.md

.github/CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+[INSERT CONTACT METHOD].
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Create a report to help us improve
+title: "[BUG] <Short description of the bug>"
+labels: bug
+assignees: ''
+
+---
+
+Thank you for contributing to JSONAPI!
+
+Before you submit an issue, please complete the report with all the relevant details for your bug and go through every item in the checklist.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Checklist**
+- [ ] I can reproduce this issue with a vanilla Swift project.
+- [ ] I can reproduce this issue using the `main` branch of this package.
+- [ ] This bug hasn't been addressed in an [existing GitHub issue](https://github.com/Datadog/swift-jsonapi/issues).
+
+**Steps to reproduce**
+Explanation of how to reproduce the incorrect behavior. This could include an attached project, a link to code, or a JSON:API document exhibiting the issue.
+1. ...
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Version information**
+- JSONAPI: [e.g. 0.1.0, or a commit hash]
+- OS: [e.g. iOS 15, macOS 13]
+- Xcode: [e.g. 15.3.0]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea for this project
+title: "[FEATURE REQUEST] <Your title here>"
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context about the feature request here.
+
+**Acceptance Criteria**
+Describe the criteria for considering this feature request complete and satisfactory.
+
+- [ ] Criteria 1
+- [ ] Criteria 2
+- [ ] Criteria 3
+
+**Resources**
+List any resources, links, or references that may be helpful for implementing this feature.
+
+**Stakeholders**
+Identify any stakeholders or user groups who would benefit from this feature.
+
+**Related Issues**
+Link any related issues or pull requests here.
+
+---
+
+*Please make sure to fill out all sections as much as possible to help us understand and implement your feature request effectively.*

CONTRIBUTING.md

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+# Contributing to JSONAPI
+
+Thanks for considering contributing! Here are some guidelines to help you get started.
+
+## Code of Conduct
+
+This project follows the [Contributor Covenant Code of Conduct](.github/CODE_OF_CONDUCT.md). Please adhere to this code
+in all interactions.
+
+## How to Contribute
+
+### Reporting Bugs
+
+- **Search existing issues** to avoid duplicates.
+- **Create a new issue** with a clear title and detailed description.
+- Include steps to reproduce, expected behavior, and screenshots if applicable.
+
+### Suggesting Enhancements
+
+- **Search existing issues** for similar suggestions.
+- **Create a new issue** with a clear title and detailed description.
+- Explain the problem and the proposed solution.
+
+### Pull Requests
+
+1. **Fork** the repository.
+2. **Clone** your fork and create a new branch.
+3. **Commit** your changes with a descriptive message.
+4. **Push** your branch to your fork.
+5. **Open a pull request** against the main branch.
+
+## Style Guides
+
+### Commit Messages
+
+- Use present tense (e.g., "Add feature" not "Added feature").
+- Be concise and descriptive.
+- Reference issues and pull requests when relevant.
+
+### Code Style
+
+- Follow the project's coding conventions.
+- Ensure your code passes all tests.
+
+## Additional Notes
+
+- Use issue labels to categorize your issue or pull request.
+- Engage in discussions and provide feedback.
+
+Thank you for your contributions!

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Datadog, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

LICENSE-3rdparty.csv

@@ -0,0 +1,5 @@
+Component,Origin,License,Copyright
+SwiftSyntax,"https://github.com/apple/swift-syntax",Apache-2.0,Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+Swift-DocC Plugin,"https://github.com/apple/swift-docc-plugin",Apache-2.0,Copyright (c) 2022 Apple Inc. and the Swift project authors
+Swift Macro Testing,"https://github.com/pointfreeco/swift-macro-testing",MIT,Copyright (c) 2023 Point-Free
+Swift Snapshot Testing,"https://github.com/pointfreeco/swift-snapshot-testing",MIT,"Copyright (c) 2019 Point-Free, Inc."

Sources/JSONAPI/CompoundDocument.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// A JSON:API document that includes related resources along with the requested primary resources.

Sources/JSONAPI/DefaultEmpty.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// A property wrapper that decodes a `nil` value into an empty instance.

Sources/JSONAPI/InlineRelationshipMany.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// A JSON:API to-many relationship that includes the related resources.

Sources/JSONAPI/InlineRelationshipOne.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// A JSON:API to-one relationship that includes the related resource.

Sources/JSONAPI/InlineRelationshipOptional.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// A JSON:API optional to-one relationship that includes the related resource.

Sources/JSONAPI/JSONAPIDecoder.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// An object that decodes JSON:API documents.

Sources/JSONAPI/JSONAPIDecodingError.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// An error that occurs during the decoding of a JSON:API document.

Sources/JSONAPI/JSONAPIEncoder.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// An object that encodes JSON:API documents.

Sources/JSONAPI/Macros.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 /// Transforms a Swift struct into a JSON:API resource that can be encoded or decoded from a JSON:API response.
 ///
 /// Annotate your models with the `@ResourceWrapper` macro to enable JSON:API encoding and decoding. At build time,

Sources/JSONAPI/RelationshipMany.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// A JSON:API to-many relationship, tagged with the related resource type.

Sources/JSONAPI/RelationshipOne.swift

@@ -1,3 +1,9 @@
+// Unless explicitly stated otherwise all files in this repository are licensed under
+// the MIT License.
+//
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2024-Present Datadog, Inc.
+
 import Foundation
 
 /// A JSON:API to-one relationship, tagged with the related resource type.