Add .pre-commit-config.yaml

[eurunuela]

Closes None.

I just realized that for some reason #973 did not include the pre-commit config file. It got removed when I reverted a commit to avoid auto-formatting on save. Sorry about that.

Changes proposed in this pull request:

• Add the pre-commit config file.

Edit: I guess a single review should be enough to merge this one.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (d11f021) 89.00% compared to head (658f7b2) 89.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #983   +/-   ##
=======================================
  Coverage   89.00%   89.00%           
=======================================
  Files          27       27           
  Lines        3411     3411           
  Branches      622      622           
=======================================
  Hits         3036     3036           
  Misses        227      227           
  Partials      148      148           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[handwerkerd]

@tsalo You have time to do a quick sanity check review before we merge?

[tsalo]

I'm not familiar with pre-commit configurations, but this config makes sense to me.