Add ContainsPattern Quality, closes #72

[dmfs]

This is just like MatchesPattern but uses find

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.08% 🎉

Comparison is base (7407801) 97.01% compared to head (5bcaf3e) 97.10%.

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Additional details and impacted files

@@             Coverage Diff              @@
##               main      #86      +/-   ##
============================================
+ Coverage     97.01%   97.10%   +0.08%     
- Complexity      612      616       +4     
============================================
  Files           158      159       +1     
  Lines          1341     1346       +5     
  Branches         47       47              
============================================
+ Hits           1301     1307       +6     
+ Misses           34       33       -1     
  Partials          6        6              

Files Changed	Coverage Δ
...nfidence/quality/charsequence/ContainsPattern.java	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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