chg: use prek instead of pre-commit

[taheeraahmed]

Used ctrl + shift + F to find all pre-commit stuff and changed it to prek, the code seems to pass the CI now 🥳 Not sure if it matters that I changed filenames and so on??

ref: #45

[frafra]

I looked at the comm

uvx --with copier_template_extensions copier copy --trust --vcs-ref prek gh:NINAnor/template-python --defaults test-prek
cd "$_"
git init
uvx prek run -a

It looks fine to me :)