[Feature]: Every node hold a local chatbot

[gufengc]

Is your feature request related to a problem?

Current only scheduler node can hold chatbot, we should let every node can hold a local chatbot.

Describe the Solution you'd like

1. Reuse current chatbot frontend
2. Build a new simple http server for node, http server forward request(chat completion and cluster status api) to scheduler lattica rpc handler @sibianl
3. scheduler rpc handler forward request to scheduler http api @gufengc
4. launch frontend and http server on node(do not launch it on scheduler) @sibianl

Alternatives Considered (Optional)

No response

Additional Context (Optional)

No response