Document development setup

[tfmorris]

There doesn't appear to be any documentation about how to set up a development environment.

Some of the things I remember having to do:

• pip install pre-commit
• python -m pip install -e .
• pre-commit install
• if you made any commits before doing the above, pre-commit run --all-files
• if ruff complains, but doesn't fix anything, either install ruff and run it by hand or temporarily uncomment the --fix argument in the pre-commit config file

[cclauss]

That would make a great pull request.

Also, some suggestions around creating a venv especially since new OSes like Debian Bookworm require a venv.

I use pipx to install cli tools like black, ruff, etc. so that they are always ready to use.