add quality module

[rainyl]

fix: #216

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 92.70073% with 10 lines in your changes missing coverage. Please review.

Project coverage is 91.20%. Comparing base (e982864) to head (d372da9).

Files with missing lines	Patch %	Lines
lib/src/contrib/quality.dart	92.70%	10 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #239      +/-   ##
==========================================
+ Coverage   91.18%   91.20%   +0.02%     
==========================================
  Files          57       58       +1     
  Lines        8506     8643     +137     
==========================================
+ Hits         7756     7883     +127     
- Misses        750      760      +10     

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