refactor: Enhance docs in UnitConversions

[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 67.30%. Comparing base (03fe106) to head (e94b7e5).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5945      +/-   ##
============================================
+ Coverage     67.28%   67.30%   +0.02%     
- Complexity     4567     4568       +1     
============================================
  Files           620      620              
  Lines         17143    17143              
  Branches       3310     3310              
============================================
+ Hits          11534    11538       +4     
+ Misses         5154     5152       -2     
+ Partials        455      453       -2     

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