Enhancement: Reuse composite actions from ergebnis/.github

[localheinz]

This pull request

• reuses composite actions from ergebnis/.github

[codecov]

Codecov Report

Merging #654 (ccc5cdd) into main (ef7f24b) will not change coverage.
The diff coverage is n/a.

❗ Current head ccc5cdd differs from pull request most recent head c02d8e9. Consider uploading reports for the commit c02d8e9 to get more accurate results

@@            Coverage Diff            @@
##               main     #654   +/-   ##
=========================================
  Coverage     99.03%   99.03%           
  Complexity      145      145           
=========================================
  Files            32       32           
  Lines           519      519           
=========================================
  Hits            514      514           
  Misses            5        5           

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