Add zizmor checks on CI.

[pixlwave]

Classic equivalent to element-hq/element-x-ios#5161

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 15.18%. Comparing base (ea0372e) to head (61eb604).
⚠️ Report is 7 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8008      +/-   ##
===========================================
- Coverage    16.58%   15.18%   -1.41%     
===========================================
  Files         1815     1815              
  Lines       119420   119420              
  Branches     47787    47787              
===========================================
- Hits         19803    18128    -1675     
- Misses       98949   100623    +1674     
- Partials       668      669       +1     

Flag	Coverage Δ
uitests	49.55% <ø> (-10.13%)	⬇️
unittests	8.80% <ø> (-0.01%)	⬇️

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