feat: Add CountingInversions new algorithm with Junit tests

[Hardvan]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.32%. Comparing base (0020ab2) to head (4270f57).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5745      +/-   ##
============================================
+ Coverage     64.23%   64.32%   +0.08%     
- Complexity     4219     4230      +11     
============================================
  Files           589      590       +1     
  Lines         16473    16500      +27     
  Branches       3174     3178       +4     
============================================
+ Hits          10581    10613      +32     
+ Misses         5458     5456       -2     
+ Partials        434      431       -3     

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