[Refactor Request] Structured objects/typing

[logan-markewich]

Amazing work here! Having tests for agents is super valuable.

Just a note to encourage contributions from other developers -- it would help to have more typing, as well as base classes for things.

Trying to wrap llama-index in this framework has been slightly confusing, since there are no types and I have to read a ton of code and debug line-by-line to see what the inputs to things are :)

[leoozy]

Thank you very much. We will add comments for the base classes. In the meantime, you can refer to LLM and agent for adding new models/ typing.

[logan-markewich]

Thanks! 🚀