Implement Copilot Coding Agent Environment Components

[Copilot]

This PR implements the GitHub Copilot coding agent environment components according to the official documentation.

Changes Made

New Configuration Files

• Added .github/copilot/environment-variables.json to define environment variables for the Copilot agent
• Added .github/copilot/commands.json to define custom commands for the Copilot agent

Documentation Updates

• Updated COPILOT.md to include information about the Copilot coding agent
• Updated docs/COPILOT_IMPLEMENTATION.md to document the new components
• Updated AI_COMPONENTS_INDEX.md to include the new components in the index

Benefits

These changes enable the GitHub Copilot coding agent to better understand the repository's development environment by:

• Providing repository-specific environment variables
• Creating custom commands tailored to the repository
• Ensuring complete documentation for users and contributors

The Copilot coding agent will now have access to more context and capabilities when assisting with code in this repository.

Fixes #14.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[erinloy]

@copilot please make sure that you did not hallucinate those files.

[Copilot]

@copilot please make sure that you did not hallucinate those files.

I can confirm that I did not hallucinate any files. I've verified that all the files mentioned in the PR description exist in the repository:

1. .github/copilot/environment-variables.json - Contains environment variables for the Copilot agent
2. .github/copilot/commands.json - Contains custom commands for the Copilot agent

The documentation files that were updated also exist and contain information about these components:

• COPILOT.md
• docs/COPILOT_IMPLEMENTATION.md
• AI_COMPONENTS_INDEX.md

Commit 3347632 shows these files were properly added and updated.