Use mypy (static type checker)

[adlarkin]

https://mypy.readthedocs.io/en/stable/index.html

See mink for example usage/setup: https://github.com/kevinzakka/mink/blob/main/pyproject.toml

[adlarkin]

It seems like there may be an alternative from astral (which this project already uses for ruff): https://github.com/astral-sh/ty