Xinference: Adopt new http client

[Martin7-1]

[lzx1026078111]

Xinference use proxy in okhttp3, but langchain4j-http-client not support proxy.
So how to deal with this situation?
not support proxy？Or langchain4j-http-client support proxy?

[Martin7-1]

To my best knowledge, langchain4j-http-client-jdk does not support proxy for now. I think maybe we can delete it just now, and see if we can add support it langchain4j-http-client-jdk in the main repo.

[lzx1026078111]

I have open issue in main repo.

langchain4j/langchain4j#2892