Rewrite String escaping

[JPercival]

• Rewrite of the StringEscapeUtils to remove dependency on Apache Commons

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 88.23529% with 4 lines in your changes missing coverage. Please review.

Project coverage is 65.91%. Comparing base (a021ffa) to head (9d7bc25).
Report is 2 commits behind head on feature-kotlin.

Files with missing lines	Patch %	Lines
...a/org/cqframework/cql/cql2elm/StringEscapeUtils.kt	87.87%	1 Missing and 3 partials ⚠️

Additional details and impacted files

@@                 Coverage Diff                  @@
##             feature-kotlin    #1468      +/-   ##
====================================================
- Coverage             65.92%   65.91%   -0.02%     
- Complexity             4853     4859       +6     
====================================================
  Files                   487      487              
  Lines                 28791    28782       -9     
  Branches               5428     5434       +6     
====================================================
- Hits                  18981    18971      -10     
+ Misses                 7595     7593       -2     
- Partials               2215     2218       +3     

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[sonarqubecloud]

Quality Gate failed

Failed conditions
69.5% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud