Revamp CI

[laurmaedje]

Revamps the CI and brings it more in line with the newer CI configs across our repos.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.32%. Comparing base (e78ac65) to head (50d4270).
⚠️ Report is 3 commits behind head on main.
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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #68   +/-   ##
=======================================
  Coverage   84.32%   84.32%           
=======================================
  Files           6        6           
  Lines        1276     1276           
=======================================
  Hits         1076     1076           
  Misses        200      200           

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