Add Microsoft Learn Contributor Chat Mode

This pull request introduces a new chat mode for GitHub Copilot Chat, specifically designed for contributing to Microsoft Learn documentation. The changes include updates to the README.md file to list this new mode and the creation of a detailed configuration file outlining its principles, behaviors, and technical specializations.

Additions to Chat Modes:

• README.md: Added the "Microsoft Learn Contributor" chat mode to the list of available modes, including installation links for both VS Code and VS Code Insiders.

New Chat Mode Definition:

• chatmodes/microsoft_learn_contributor.chatmode.md: Introduced a comprehensive configuration for the "Microsoft Learn Contributor" chat mode. This includes:
  • Persona overview, principles, and mission.
  • Detailed guidelines for writing, reviewing, and contributing to Microsoft Learn documentation.
  • Emphasis on compliance with the Microsoft Writing Style Guide, accessibility standards, and GitHub workflows.
  • Example prompts and responses to assist contributors in common scenarios.

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• My contribution adds a new instruction, prompt, or chat mode file in the correct directory.
• The file follows the required naming convention.
• The content is clearly structured and follows the example format.
• I have tested my instructions, prompt, or chat mode with GitHub Copilot.
• I have run node update-readme.js and verified that README.md is up to date.

Description

This contribution adds a specialized chat mode for GitHub Copilot Chat that assists users in contributing to Microsoft Learn documentation. The mode provides expert guidance on Microsoft's writing style, documentation standards, accessibility requirements, and contribution workflows. It helps both new and experienced contributors create high-quality technical content that aligns with Microsoft Learn's editorial standards and guidelines.

The chat mode includes specialized knowledge about:

• Microsoft Writing Style Guide compliance
• Accessibility and inclusive design principles
• GitHub workflow for documentation contributions
• Technical writing best practices for learning content
• Common scenarios and troubleshooting for contributors

Type of Contribution

• New instruction file.
• New prompt file.
• New chat mode file.
• Other (please specify):

Additional Notes

This chat mode is designed to complement the existing Microsoft Learn contributor documentation and provide real-time assistance during the writing and review process. It has been tested with various common contributor scenarios and provides contextually appropriate guidance for different types of Microsoft Learn content including tutorials, quickstarts, and reference documentation.

By submitting this pull request, I confirm that my contribution abides by the Code of Conduct and will be licensed under the MIT License.