Linting rules are pretty strict

This might sometimes be what you want, but it's worth noting that
* the ruff rules are pretty strict and include automatically fixing a lot of issues. This is very much a matter of taste, but I personally dislike autofixes. For instance, I add an import, don't yet get to adding the part that uses the import, save the file, my editor automatically runs ruff and removes the import as unused.
* mypy complains a lot, including about missing stub packages and missing type annotations. I think we set it up with "loose" as the setting for typing (@rwood-97 is that right?).

These aren't necessarily issues to be fixed, but I wonder if it would be good to have options for some more relaxed linter/fixer rules when setting up.

Tagging @rwood-97 and @mastoffel since these were observations that came from working on a new repo with them.