Use mkdocstrings for documenting Python code

[Archmonger]

Current Situation

Currently, our Python APIs are manually added to the docs, which can potentially result in API <-> Docs mismatch.

Proposed Actions

Use mkdocstrings within the docs to automatically generate markdown based on Python code, type hints, and docstrings.

Implementing this is currently blocked by these issues:

• mkdocstrings/mkdocstrings#450
• mkdocstrings/mkdocstrings#466