feat: check for valid rule names in the config file. Closes #12

[radiovisual]

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Codecov Report

Attention: Patch coverage is 95.65217% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.77%. Comparing base (2face78) to head (2051281).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/utils/rules-helpers.ts	66.66%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
- Coverage   96.85%   96.77%   -0.09%     
==========================================
  Files          28       28              
  Lines         382      403      +21     
  Branches       70       74       +4     
==========================================
+ Hits          370      390      +20     
- Misses         11       12       +1     
  Partials        1        1              

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