[Feature request] Add more automatic configuration for LangChain LLMs for Python processors about langstream HOT 2 OPEN

One idea is that we could provide a Mixin or Decorator that automatically wires up certain properties based on the configuration specified. That way, if someone wants a different behavior, there's a path to customize it without introducing breaking changes.

from langstream.

I noticed that the various chat models are all grouped in this folder: https://github.com/devinbost/langchain/tree/d266b3ea4a5dc85fe895b93090d89aa311f8c48e/libs/langchain/langchain/chat_models

For conversational memory and other such features, they're extremely useful, and I'd expect the list of them to grow quickly. The base LLMs are more primitive models, so often once someone gets beyond the initial case of API integration with a base model, they then want things like conversational memory, and that's where the chat models are really useful.

from langstream.