[Feature Request]: expose neo4j graph to graphRAG

[jli113]

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.

Turn my existing neo4j knowledge graph into graphRAG and use it for question answering, not graphRAG into neo4j.

Describe the solution you'd like

No response

Additional context

No response