Add .circleci/config.yml

[mbastian93]

add setup for circle ci

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (1970836) 78.77% compared to head (815e0bc) 78.77%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #456   +/-   ##
=======================================
  Coverage   78.77%   78.77%           
=======================================
  Files          39       39           
  Lines         928      928           
  Branches      157      157           
=======================================
  Hits          731      731           
  Misses         85       85           
  Partials      112      112           

Flag	Coverage Δ
unittests	78.77% <ø> (ø)

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