[Feature][ChatKnowledge] Enhance GraphRAG by lightweight graph community summary

[fanzhidongyzby]

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• [X] I had searched in the issues and found no similar feature requirement.

Description

Add graph community summary capability to GraphRAG framework, and achieve knowledge extraction, community summary and knowledge recall at lower cost.

Use case

Key Updates:

1. More efficient knowledge extraction capabilities and knowledge graph structure enhancement.
2. Add graph community summaries, support efficient community construction and recall, and reserve scalability of community discovery algorithm.
3. Implementation of global / local search, and be compatible with GraphRAG framework query by intent recognition.

Related issues

Previous Issues:

• https://github.com/eosphoros-ai/DB-GPT/issues/1505

Feature Priority

High

Are you willing to submit PR?

• [X] Yes I am willing to submit a PR!