feat-Add MaximumProductSubarray

[Sachinn-64]

• 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 76.45%. Comparing base (4fe37c3) to head (34d2e4e).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6711      +/-   ##
============================================
+ Coverage     76.43%   76.45%   +0.02%     
- Complexity     5974     5980       +6     
============================================
  Files           714      715       +1     
  Lines         20240    20254      +14     
  Branches       3927     3929       +2     
============================================
+ Hits          15471    15486      +15     
  Misses         4178     4178              
+ Partials        591      590       -1     

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[Sachinn-64]

@DenizAltunkapan
@yanglbme
@alxkm

[alxkm]

Looks good. Thank you for the contribution.