Add RockPaperScissors game implementation

[ligiastalves]

• [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

❌ Patch coverage is 70.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.26%. Comparing base (55da3b9) to head (03d3c4b).

Files with missing lines	Patch %	Lines
...ealgorithms/puzzlesandgames/RockPaperScissors.java	70.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6964      +/-   ##
============================================
- Coverage     78.27%   78.26%   -0.01%     
- Complexity     6573     6578       +5     
============================================
  Files           743      744       +1     
  Lines         21895    21905      +10     
  Branches       4288     4289       +1     
============================================
+ Hits          17139    17145       +6     
- Misses         4073     4076       +3     
- Partials        683      684       +1     

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