Summary

• Introduces a new GitHub Provider to enable free GPT-4 chat completions using only a GitHub Copilot subscription.
• Implements device code flow for authentication and session token retrieval.
• Adds a dedicated test (tests/providers/test_github_provider.py) ensuring the provider’s functionality.
• Updates the README with instructions on using the new provider.
• Inspired by freegpt.

Implementation Details

• github_provider.py handles authentication (device code flow) and chat completions.
• Test file validates streaming responses and confirms correct JSON parsing.
• Pre-commit formatting ensures code consistency.

How to Test

1. Install dependencies with poetry install --with dev,test.
2. Run poetry run pytest tests/providers/test_github_provider.py.
3. Confirm all tests pass without errors.

Additional Notes

• This change follows the AISuite CONTRIBUTING.md guidelines.
• No breaking changes introduced.
• Happy to address any feedback or review comments!