test: improve coverage for util classes

[RoiSoleil]

• Increased test coverage for WordTokenizer, TypeComparator, and SearchScopeSingelton utility classes.
• Added edge cases in tests, such as string handling for different capitalization and special characters in types.
• Followed isolated testing best practices and properly mocked Eclipse dependencies.

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PR created automatically by Jules for task 4629013683949419830 started by @RoiSoleil

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[codecov]

Codecov Report

❌ Patch coverage is 90.90909% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.89%. Comparing base (6af7d21) to head (c980285).

Files with missing lines	Patch %	Lines
...est/test/org/moreunit/util/TypeComparatorTest.java	71.42%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #356      +/-   ##
============================================
+ Coverage     79.85%   79.89%   +0.03%     
- Complexity     4071     4078       +7     
============================================
  Files           513      513              
  Lines         17361    17405      +44     
  Branches       1339     1343       +4     
============================================
+ Hits          13863    13905      +42     
+ Misses         2931     2930       -1     
- Partials        567      570       +3     

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