Add Sphinx AutoAPI to create documentation for python code

We should introduce [Sphinx AutoAPI](https://sphinx-autoapi.readthedocs.io/en/latest/) to automatically generate API documentation from the docstrings of python code within the repository.

No files, tests, or documentation entry points are named. Start by reading the linked Sphinx AutoAPI documentation and locating the repository's documentation configuration; define the generated API documentation scope and verify that it builds from the Python docstrings.

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