refactor: Intersection

[alxkm]

• Improved wording for readability
• Used {@link} and {@code} tags for better Javadoc formatting
• Specified result order depends on the second array

• 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 74.61%. Comparing base (ca7c77f) to head (e142117).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6379      +/-   ##
============================================
- Coverage     74.62%   74.61%   -0.01%     
+ Complexity     5455     5454       -1     
============================================
  Files           682      682              
  Lines         19009    19009              
  Branches       3671     3671              
============================================
- Hits          14185    14184       -1     
  Misses         4262     4262              
- Partials        562      563       +1     

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