workflows: setup CodeQL

[roman-khimov]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.80%. Comparing base (87e2570) to head (5412874).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #103      +/-   ##
==========================================
- Coverage   63.89%   63.80%   -0.09%     
==========================================
  Files          26       26              
  Lines        1573     1575       +2     
==========================================
  Hits         1005     1005              
- Misses        501      502       +1     
- Partials       67       68       +1     

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[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.

[AnnaShaleva]

CodeQL look pretty without these comments.