feat: Add exit code 2 for the warning output

[idsulik]

#6

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.33%. Comparing base (9c9d6e5) to head (5b264af).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main       #7   +/-   ##
=======================================
  Coverage   82.33%   82.33%           
=======================================
  Files           7        7           
  Lines         436      436           
=======================================
  Hits          359      359           
  Misses         58       58           
  Partials       19       19           

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