Improve comments, function & class documentation in IndexOfRightMostSetBit.java

[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 53.98%. Comparing base (842ff52) to head (86d1f76).
Report is 20 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5579      +/-   ##
============================================
+ Coverage     52.31%   53.98%   +1.67%     
- Complexity     3259     3388     +129     
============================================
  Files           526      535       +9     
  Lines         15205    15429     +224     
  Branches       2892     2942      +50     
============================================
+ Hits           7954     8329     +375     
+ Misses         6924     6748     -176     
- Partials        327      352      +25     

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