docstrings

[bmos]

What's Changed

• Added docstrings
• Code formatting changes.
• Changed to if not isinstance(v, str): instead of if type(v) ~= str:.
• Used f-strings in more places and lazy evaluation of string formatting in all logging.
• Removed unused import from importlib.metadata import files.
• Added two more email exceptions.
• Removed unused arg from main function of validateVote.py.
• Increased specificity of type hinting: list -> list[list[str]] or list[str] when appropriate.
• Refactored some simple for statements using list or dict comprehension.

Closes issue #15, unless that is also requesting docstrings for the Recommit-Drive-2022 files.

[bmos]

For the changes, I targeted a longer line length as per our prior conversation. If 160 is still not long enough feel free to give me a target for future PRs.

The only change I thought might be particularly contentious is https://github.com/Austin-DSA/Membership-Engagment-Tools/commit/6d95f7fce78f51e182eb3382264c32cd3de7f0bf, so feel free to revert that if you don't like how it looks.