add codeql-analysis.yml

[bachue]

[codecov[bot]]

Codecov Report

Merging #401 (d885d42) into master (8f2fffd) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #401   +/-   ##
=======================================
  Coverage   68.17%   68.17%           
=======================================
  Files          20       20           
  Lines        1879     1879           
=======================================
  Hits         1281     1281           
  Misses        598      598           

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