feat: Add FairShareScheduling new algorithm with Junit tests

[Hardvan]

• 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

Attention: Patch coverage is 96.15385% with 1 line in your changes missing coverage. Please review.

Project coverage is 69.78%. Comparing base (ecf4c37) to head (8d72ffb).

Files with missing lines	Patch %	Lines
.../thealgorithms/scheduling/FairShareScheduling.java	96.15%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5815      +/-   ##
============================================
+ Coverage     69.73%   69.78%   +0.05%     
- Complexity     4718     4725       +7     
============================================
  Files           630      631       +1     
  Lines         17231    17257      +26     
  Branches       3319     3322       +3     
============================================
+ Hits          12016    12043      +27     
+ Misses         4758     4757       -1     
  Partials        457      457              

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