Improve BinarySearch documentation with examples and explanation

[AbhiramSakha]

Closes #
Closes #
Improved documentation for BinarySearch by adding:

• Step-by-step explanation
• Example usage
• Time complexity details

This helps beginners understand the algorithm more clearly.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.45%. Comparing base (af1d9d1) to head (56c31c1).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #7328   +/-   ##
=========================================
  Coverage     79.45%   79.45%           
- Complexity     7074     7078    +4     
=========================================
  Files           789      789           
  Lines         23150    23150           
  Branches       4553     4553           
=========================================
+ Hits          18393    18394    +1     
- Misses         4021     4022    +1     
+ Partials        736      734    -2     

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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.