docs: Add Javadoc to sorts/BubbleSort.java

[Born-as-Harsha]

Hello Maintainers,

I'm submitting this PR to enhance the documentation quality for the Bubble Sort algorithm.

Contribution Details:
Type: Code Quality / Documentation Enhancement
Action: Added comprehensive Javadoc blocks to the "BubbleSort" class and its primary methods.
Goal: Ensures the file meets current repository standards for documentation and testability.

This contribution was created "manually by me (Born-as-Harsha)" to improve the project's documentation.

Thank you for the opportunity to contribute and for your time reviewing!

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.33%. Comparing base (dfd8d69) to head (0fbf707).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #7015   +/-   ##
=========================================
  Coverage     78.32%   78.33%           
- Complexity     6615     6616    +1     
=========================================
  Files           746      746           
  Lines         22022    22022           
  Branches       4321     4321           
=========================================
+ Hits          17249    17250    +1     
  Misses         4085     4085           
+ Partials        688      687    -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Born-as-Harsha]

/retest
/lgtm