clang-format taken from libinput, except for
ColumnLimit: 100
and some macro definitions (which don't all have an effect anyway...)
It's not perfect but good enough and at least consistent.
Part-of: <https://gitlab.freedesktop.org/libinput/libei/-/merge_requests/383>
Moving my local hooks into a pre-commit hook set that others can find
useful too:
- remove trailing whitespaces and newlines
- don't allow commits to the "main" branch
- python black and python ruff (same args as in the CI)
