refactor: Enhance docs, add more tests in `ReverseBits`

[Hardvan]

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized it.
• [x] All filenames are in PascalCase.
• [x] All functions and variable names follow Java naming conventions.
• [x] All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• [x] 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 :white_check_mark:

Project coverage is 72.96%. Comparing base (54567e2) to head (c7adcba).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5859      +/-   ##
============================================
- Coverage     72.98%   72.96%   -0.02%     
+ Complexity     5029     5028       -1     
============================================
  Files           655      655              
  Lines         17588    17588              
  Branches       3387     3387              
============================================
- Hits          12836    12833       -3     
- Misses         4261     4262       +1     
- Partials        491      493       +2     

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