Run code scanner from main workflow

[Mrtenz]

This updates the code scanner workflow to run from the main workflow, instead of a separate workflow.

[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 94.88%. Comparing base (edb6986) to head (8a33e69).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3073   +/-   ##
=======================================
  Coverage   94.88%   94.88%           
=======================================
  Files         506      506           
  Lines       11124    11124           
  Branches     1703     1703           
=======================================
  Hits        10555    10555           
  Misses        569      569           

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