refactor: Enhance docs, add tests in CursorLinkedList

[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

Attention: Patch coverage is 95.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 68.72%. Comparing base (3a8b04a) to head (b4bae5b).

Files with missing lines	Patch %	Lines
...orithms/datastructures/lists/CursorLinkedList.java	95.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5994      +/-   ##
============================================
+ Coverage     68.31%   68.72%   +0.41%     
- Complexity     4611     4630      +19     
============================================
  Files           620      620              
  Lines         17107    17112       +5     
  Branches       3302     3302              
============================================
+ Hits          11687    11761      +74     
+ Misses         4973     4900      -73     
- Partials        447      451       +4     

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