add example to demonstrate the usage of bashi

[SimeonEhrig]

• use example as integration test in the CI
• add globals ON and OFF as string equivalent of ON_VER and OFF_VER

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (539638f) 95.71% compared to head (30ab5fc) 95.71%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #16   +/-   ##
=======================================
  Coverage   95.71%   95.71%           
=======================================
  Files          10       10           
  Lines         280      280           
  Branches       66       66           
=======================================
  Hits          268      268           
  Misses          7        7           
  Partials        5        5           

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