Change LICENSE + update and clean several parts of repo (#1459)

* Update license and contributing, add new CoC

* Remove outdated info, update issue templates

* Fix more links and wording

.github/FUNDING.yml

@@ -1,3 +1 @@
-github: rauenzi
-patreon: Zerebos
-custom: ["https://paypal.me/ZackRauen"]
+github: rauenzi

.github/ISSUE_TEMPLATE/BUG-REPORT.yml

@@ -0,0 +1,71 @@
+name: Bug Report
+description: Create a bug report to help us find and fix bugs!
+title: "[Bug]"
+labels: [bug]
+body:
+- type: checkboxes
+  attributes:
+    label: Before Reporting
+    description: "I have double checked and agree with the following:"
+    options:
+    - label: I found no existing issues matching my bug
+      required: true
+    - label: My issue is not caused by a plugin or theme
+      required: true
+- type: textarea
+  attributes:
+    label: Describe the Bug
+    description: A clear and concise description of what you're experiencing. If applicable, add screenshots to help explain your problem.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Expected Behavior
+    description: A clear and concise description of what you expected to happen.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Steps To Reproduce
+    description: Steps to reproduce the behavior.
+    placeholder: |
+      1. In this environment...
+      2. With this config...
+      3. Run '...'
+      4. See error...
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: Operating System
+    options:
+      - Windows
+      - MacOS
+      - Linux
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: Discord Version
+    options:
+      - Stable
+      - Canary
+      - PTB
+  validations:
+    required: true
+- type: input
+  attributes:
+    label: BetterDiscord Version
+    description: This is found in `Settings > Updater` and will be labelled as the `Core` version.
+    placeholder: v1.x.x
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Anything else?
+    description: |
+      Links? References? Anything that will give us more context about the issue you are encountering!
+
+      Tip: You can attach images or log files by clicking this area to highlight it and then dragging files in.
+  validations:
+    required: false

.github/ISSUE_TEMPLATE/FEATURE-REQUEST.yml

@@ -0,0 +1,27 @@
+name: Feature Request
+description: Suggest an idea for this project!
+title: "[Feature]"
+labels: [enhancement]
+body:
+- type: checkboxes
+  attributes:
+    label: Before Requesting
+    description: "I have double checked and agree with the following:"
+    options:
+    - label: I found no existing issue matching my feature request
+      required: true
+- type: textarea
+  attributes:
+    label: Describe the feature you'd like!
+    description: A clear and concise description of what you want to see in BetterDiscord.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Anything else?
+    description: |
+      Links? References? Anything that will give us more context about the feature you are requesting!
+
+      Tip: You can attach images by clicking this area to highlight it and then dragging files in.
+  validations:
+    required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: BetterDiscord Support Server
+    url: https://betterdiscord.app/invite
+    about: The best place to get immediate support.
+  - name: Troubleshooting Guide
+    url: https://docs.betterdiscord.app/users/getting-started/troubleshooting
+    about: The user troubleshooting guide from the documentation.

CODE_OF_CONDUCT.md

@@ -0,0 +1,12 @@
+# Code of Conduct
+
+- We are committed to providing a friendly, safe and welcoming environment for all, regardless of level of experience, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, ethnicity, age, religion, nationality, or other similar characteristic.
+- Please avoid using overtly sexual aliases or other nicknames that might detract from a friendly, safe and welcoming environment for all.
+- Please be kind and courteous. There’s no need to be mean or rude.
+- Respect that people have differences of opinion and that every design or implementation choice carries a trade-off and numerous costs. There is seldom a right answer.
+- Please keep unstructured critique to a minimum. If you have solid ideas you want to experiment with, make a fork and see how it works.
+- We will exclude you from interaction if you insult, demean or harass anyone. That is not welcome behavior. We interpret the term `harassment` as including the definition in the [Citizen Code of Conduct](https://github.com/stumpsyn/policies/blob/master/citizen_code_of_conduct.md); if you have any lack of clarity about what might be included in that concept, please read their definition. In particular, we don’t tolerate behavior that excludes people in socially marginalized groups.
+- Private harassment is also unacceptable. No matter who you are, if you feel you have been or are being harassed or made uncomfortable by a community member, please contact one of the channel ops or any of the [BetterDiscord staff](https://betterdiscord.app/invite) immediately. Whether you’re a regular contributor or a newcomer, we care about making this community a safe place for you and we’ve got your back.
+- Likewise any spamming, trolling, flaming, baiting or other attention-stealing behavior is not welcome.
+
+This code of conduct is adapted from the [Rust Code of Conduct](https://www.rust-lang.org/policies/code-of-conduct).