[Summary] Good AI/LLM Tasks for Newcomers

## For Newcomers/Students: (新手村任务)

- [ ] .... (check in the sub-issues)

## Tiny Task

- [x] enable auto-building LLM doc in all HugeGraph repos🤖 (refer [here](https://deepwiki.com/badge-maker?url=https%3A%2F%2Fdeepwiki.com%2Fapache%2Fincubator-hugegraph-ai%2F5.2-web-demo)) & add the `deepwiki` 🔗 link in README as one of the priority document references (So as other repos)
- [ ] Fix the `TODO` / `FIXME` in (LLM)code (Could submit PR directly when modification is tiny)- [ ]
- [ ] upgrade to python3.11/3.12 (for better perf & syntax check)
- [ ] use `ruff` for code format (replace black/flake)
- [ ] use `mypy` for code lint (Enhance code robustly)
- [ ] .... (check details in the `sub-issues` ↓)

## Medium Task
- [ ] #228
- [x] #239
- [ ] support MCP for HugeGraph server (provide CRUD for vertex & edge)
- [ ] support MCP for GraphRAG server (...)

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## Refer Docs: (Read Fisrt)
- https://github.com/apache/incubator-hugegraph-ai/wiki#aillmml-docs
- https://deepwiki.com/apache/incubator-hugegraph-ai
- https://github.com/apache/incubator-hugegraph-ai/blob/main/hugegraph-llm/quick_start.md
- https://github.com/apache/incubator-hugegraph/wiki/The-style-config-for-HugeGraph-in-IDEA#0x00-github-prgit-processusage (**Read it** before submit a PR~)