Make API layer implementation support `async` and `streaming` output mode

[imbajin]

refer: https://github.com/apache/incubator-hugegraph-ai/tree/main/hugegraph-llm/src/hugegraph_llm/api

At present, we only support synchronous return, without asynchronous implementation or the option to add streaming output

[chiruu12]

Can i work on this issue?

[chiruu12]

Do i also have to do the TODO part in the rag_api.py file?

[imbajin]

rag_api.py

@chiruu12 Not necessary, it's not important at the moment(fewer calls), we can handle it later

[imbajin]

Due to long time with no update, this task can be taken over by other devs

[XL-Zhao-23]

I noticed this issue has not been updated for a while. Is it still open and looking for contributions? I’d be happy to help. @imbajin

[imbajin]

I noticed this issue has not been updated for a while. Is it still open and looking for contributions? I’d be happy to help.

@XL-Zhao-23 Yes, welcome your contribution~ 💯 Assign to you now~