Get django model testing working

[rcxwhiz]

I think that the django-model-utils repo is going to be my best example of a project that writes and tests stuff with django models.

[rcxwhiz]

It looks like I should be using pytest-django. Still have yet to figure out if I should be using pytest/tox (or both?).

[rcxwhiz]

Got tox running locally as well as in GH actions. Still need to resolve pre-commit. I don't know if I want to force tox to run for every pre-commit, or if I want to just run the tests from tox on the current environment. It seems like my pre-commit tox setup was a little bugged. I would also like to get pip stuff cached in my actions test script.

[rcxwhiz]

There is also the question of putting black into the mix.

[rcxwhiz]

I think I just added some sort of dependency caching to the actions script, so I'm considering that done for now.

[rcxwhiz]

I got the pre-commit hooks working. I decided against adding tox or even pytest to it because according to some best practices that would slow down the commit process too much and people should be running their tests before they commit. Now the only remaining item is to decide the fate of incorporating black into the project.

[rcxwhiz]

I've decided to put a pin in adding black formatting to the project right now. Maybe it will seem appropriate later.