Added Documentation in MergeSortRecursive.java

[AdityaKeshari05]

This pull request enhances the readability and maintainability of the MergeSortRecursive implementation by adding clear, structured, and professional comments throughout the code.

The changes focus purely on documentation and do not alter the existing logic or behavior of the algorithm.

What was improved

Added class-level and method-level JavaDoc comments

Clearly explained:

The purpose of the class

Recursive divide-and-conquer flow of Merge Sort

Base cases and merge logic

Improved inline comments to explain why each step is performed

Made the code more beginner-friendly and interview-ready

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.91%. Comparing base (e945f16) to head (2ad6265).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #7190   +/-   ##
=========================================
  Coverage     78.91%   78.91%           
  Complexity     6883     6883           
=========================================
  Files           774      774           
  Lines         22746    22746           
  Branches       4468     4468           
=========================================
+ Hits          17949    17951    +2     
+ Misses         4077     4076    -1     
+ Partials        720      719    -1     

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[github-actions]

This pull request has been automatically closed because its workflows or checks failed and it has been inactive for more than 14 days. Please fix the workflows and reopen if you'd like to continue. Merging from main/master alone does not count as activity.