[Feature Request]: add the code4llm demo

[johnpyp]

Do you need to file an issue?

• I have searched the existing issues and this feature is not already filed.
• My model is hosted on OpenAI or Azure. If not, please look at the "model providers" issue and don't file a new one here.
• I believe this is a legitimate feature request, not just a question. If this is a question, please use the Discussions area.

Is your feature request related to a problem? Please describe.

The code4llm demo that Mark Russinovich showed during his talk https://youtu.be/1VgptLwP588 (minute 32), was an excellent demonstration of the power of this library. Personally, I wasn’t thinking that GraphRAG was anything particularly special, until I saw that demo and the improvement over normal in-context translation.

Describe the solution you'd like

Add the code4llm demo to the repository or separately, to demonstrate the power of graphrag.

Additional context

No response