ci: Add tests for mesa-examples

[rht]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1d48db5) 79.45% compared to head (1039e96) 79.45%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1956   +/-   ##
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  Coverage   79.45%   79.45%           
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  Files          15       15           
  Lines        1285     1285           
  Branches      285      285           
=======================================
  Hits         1021     1021           
  Misses        225      225           
  Partials       39       39           

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[EwoutH]

High level, looks good. Obviously the examples need to be fixed, but that can be done in another PR.

Thanks!

[Corvince]

Agree with @EwoutH but we shouldn't merge just yet - otherwise we have a failing CI until the issues are resolved. But PR is super fine.

[rht]

I need to merge this so that I can debug the weakref stuff in another PR.