Add documentation for github-docs-agent sample

[cristipufu]

This PR adds documentation for the github-docs-agent sample as requested in issue #72. It includes details on purpose, setup, usage, and expected outputs.

[cristipufu]

I've reviewed the documentation changes for the GitHub Docs Agent sample. Here's my feedback:

Overall Impression

The documentation provides a good foundation for users to understand and get started with the GitHub Docs Agent sample. The structure is clear and covers the essential aspects: purpose, requirements, setup, and usage.

Positive Aspects

1. Clear and logical structure with well-defined sections
2. Includes all necessary setup steps including environment configuration
3. Provides concrete examples with command-line snippets
4. Good formatting with proper Markdown usage for code blocks

Suggestions for Improvement

1. Requirements Section:

   • Consider specifying minimum Python version if there are version-specific dependencies
   • List all required packages explicitly instead of using "e.g., requests"
   • Add any specific GitHub permissions/scopes needed for the token

2. Setup Section:

   • Add instructions for Windows users (environment variable setup differs)
   • Consider adding a troubleshooting subsection for common issues

3. Usage Section:

   • Add example command-line arguments if the script accepts any
   • Include sample output to show what users should expect
   • Add error handling scenarios and how to resolve them

4. General:

   • Consider adding a "Contributing" section
   • Include links to relevant GitHub API documentation
   • Add a "License" section or reference to the project's license

Technical Accuracy

Please verify:

1. The script name github_docs_agent.py matches the actual implementation
2. All listed requirements are included in the project's requirements.txt
3. The minimum Python version requirement is accurate

Minor Issues

1. The file ends without a newline (line 40)
2. Consider using more specific examples in the "Expected Outputs" section

Overall, this is a solid foundation for the documentation. With the suggested improvements, it will provide an even better experience for users working with the GitHub Docs Agent sample.

Would you like me to make any of these suggested changes in a follow-up PR?