Type annotations, mypy config, pydoclint setup, and other changes #23

Job	Run time
mypy	3m 55s
py3.12 \| macos \| integration tests	15m 53s
py3.12 \| macos \| unit tests	9m 59s
py3.12 \| ubuntu \| integration tests	18m 7s
py3.12 \| ubuntu \| unit tests	13m 20s
py3.12 \| windows \| integration tests	31m 48s
py3.12 \| windows \| unit tests	19m 19s
py3.10 \| ubuntu \| unit tests	11m 51s
py3.11 \| ubuntu \| unit tests	12m 23s
	2h 16m 35s

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