Configure mypy as a pre-commit hook and add all type hints necessary for
mypy to pass.
There's still more work to be done here typing a lot more code, but this
provides a clear starting point.
reorder-python-imports is hard to set up correctly.
isort is a lot simpler to set to set up it locally, and is kinda
becoming the standard in the python world.
The import style remains the same, and is tweaked to minimise conflicts.
I don't want to ever have to sort imports again. It's a poor use of
developer time. Automate this with a pre-commit hook, and check this on
CI.
Developers: I suggest you configure your editor to use
`reorder_python_imports`. It uses the standard sorting, and detects
first/third party libs well.
