docs: Improve comments and documentation for Strassen algorithm

[ITZ-NIHALPATEL]

• 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 78.15%. Comparing base (e21aee8) to head (ffcfcd6).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #6944   +/-   ##
=========================================
  Coverage     78.15%   78.15%           
  Complexity     6503     6503           
=========================================
  Files           741      741           
  Lines         21675    21676    +1     
  Branches       4236     4236           
=========================================
+ Hits          16940    16941    +1     
  Misses         4063     4063           
  Partials        672      672           

☔ 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.