Add codespell to pre-commit

[ClausKlein]

• depends on Fix compiler warnings #41

[DeveloperPaul123]

LGTM, though I don't use pre-commit

[wusatosi]

LGTM, though I don't use pre-commit

I do recommend you set it up if you plan to contribute to this project.
Otherwise CI will be angry.

[DeveloperPaul123]

LGTM, though I don't use pre-commit

I do recommend you set it up if you plan to contribute to this project. Otherwise CI will be angry.

I might, we'll see. I generally don't maintain a global python install as I use uv so I'm not the biggest fan of tools that must be installed via pip. I'll see if I can give it a try though.