[Feature Request]: Please support stream_chat for vllm

[DavidLetGo]

Feature Description

Need to implement the stream_chat function.

class Vllm(LLM):
@llm_chat_callback()
def stream_chat(
self, messages: Sequence[ChatMessage], **kwargs: Any
) -> ChatResponseGen:
raise (ValueError("Not Implemented"))

code source:
https://github.com/run-llama/llama_index/blob/main/llama-index-integrations/llms/llama-index-llms-vllm/llama_index/llms/vllm/base.py

Reason

No response

Value of Feature

vLLM is popular and widely used. Is it possible to integrate it to this project?

[DavidLetGo]

Anyone will help?