Typing support missing

[nhairs]

Problem explanation

The stream package does not expose typing information.

Taking a brief look at the code, the code does not use type-hints internally, so it's not as simple as adding the py.typed file in the package root.

This prevents downstream projects to using type-checking tools like MyPy.

It would be great to have typing information added (similar to https://github.com/GetStream/stream-chat-python).