Docs: Add guidelines for contributors

[mattdot]

This pull request includes updates to the documentation and developer guidelines for the Terraform Provider for Power Platform. The changes aim to provide clearer instructions for contributors and improve the overall structure of the documentation. The most important changes include adding a dynamic configuration guide, enhancing the contribution guidelines, and reorganizing developer resources.

Documentation updates:

• .changes/unreleased/documentation-20250303-071315.yaml: Added a dynamic configuration guide to the user documentation.
• CONTRIBUTING.md: Reorganized and expanded the contribution guidelines, including a new section on examples and clarifying the process for contributing new resources and data sources.

Developer guidelines:

• DEVELOPER.md: Reorganized the developer documentation, added a summary of developer resources, and detailed the developer workflow, including setting up development environments using GitHub Codespaces or local devcontainers.
• DEVELOPER.md: Updated the section on testing guidelines to provide detailed instructions on writing unit and acceptance tests, and the importance of comprehensive test coverage.This pull request to the Terraform Provider for Power Platform repository includes significant updates to the CONTRIBUTING.md and DEVELOPER.md files, as well as the addition of new documentation files. The changes aim to improve the contribution guidelines, developer setup instructions, and testing practices. The most important changes include restructuring the contribution types, enhancing developer resource documentation, and adopting httpmock for unit testing.

Contribution Guidelines and Examples:

• CONTRIBUTING.md: Restructured the contribution types section to clarify the difficulty levels of different contributions and added detailed examples for contributing to the Power Platform Terraform Provider.

Developer Setup and Resources:

• DEVELOPER.md: Enhanced the documentation by adding a comprehensive summary of developer resources, including guidelines for testing, security, schema design, and community support. Introduced two recommended development environment options: GitHub Codespaces and Local Devcontainer.
• DEVELOPER.md: Provided detailed instructions for setting up and configuring Git credentials in both GitHub Codespaces and Local Devcontainer environments.

Decision Logs and Testing:

• decision-log/loosely_typed_resources.md: Removed the decision log for loosely typed resources, which outlined the rationale and comparison between strongly typed and loosely typed resources in the Terraform Provider for Power Platform.
• devdocs/adr/httpmocks.md: Added a new ADR document detailing the adoption of httpmock for HTTP request mocking in unit tests, highlighting the benefits and implementation guidelines for improved test reliability and determinism.This pull request includes several documentation updates and additions to improve clarity and support for developers and users of the Terraform Provider for Power Platform. The most important changes are summarized below:

Documentation Updates:

• Decision Log Removal:

  • Removed the decision log outlining the rationale for implementing loosely typed Terraform resources in decision-log/loosely_typed_resources.md.

• New ADR Document:

  • Added a new ADR document summarizing the rationale and benefits of loosely typed Terraform resources, specifically powerplatform_data_record and powerplatform_data_records in devdocs/adr/loosely_typed_data_records.md.

• Community Support Documentation:

  • Added a comprehensive community support document including FAQs, developer support channels, and best practices for working with maintainers in devdocs/community_support.md.

• Observability and Logging Guidelines:

  • Introduced guidelines for observability and logging, emphasizing the use of HashiCorp’s tflog package for structured logging and the importance of not logging sensitive information in devdocs/observability_guidelines.md.

[ianjensenisme]

Minor updates requested

[eduardodfmex]

Thank you for creating and extending the documentation..!
I add a couple of suggestions.