Added type hints for all functions; Added parameter documentation; Updated GitHub actions to work better with nox and poetry;

[rajivsarvepalli]

All functions, classes, and modules are documented completely. Also, ensured types are checked statically and dynamically. Ensure types are appropriately tested to not miss any edge cases such as List[int] instead of Sequence[int]. poetry and nox should interface better now and typeguard has been to run to test typing. However, mypy is not run yet due to lack of stubs for sqlalchemy. I will investigate further to see if mypy is reasonable to run on sqlalchemy and this project.

Fixes #6