feature: Adding MinSumKSizeSubarray in Sliding Window Algorithm

[rashi07dashore]

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized it.
• [x] All filenames are in PascalCase.
• [x] All functions and variable names follow Java naming conventions.
• [x] All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• [x] 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 :white_check_mark:

Project coverage is 70.65%. Comparing base (4d85c61) to head (9a9bbbf).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6025      +/-   ##
============================================
+ Coverage     70.64%   70.65%   +0.01%     
- Complexity     4843     4847       +4     
============================================
  Files           648      649       +1     
  Lines         17511    17521      +10     
  Branches       3374     3376       +2     
============================================
+ Hits          12370    12380      +10     
  Misses         4678     4678              
  Partials        463      463              

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[rashi07dashore]

Please add JUnit tests

@siriak please check. Thank you~