feat: Add PrefixEvaluator 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 90.47619% with 2 lines in your changes missing coverage. Please review.

Project coverage is 64.10%. Comparing base (b0c8a8f) to head (1a321e1).

Files with missing lines	Patch %	Lines
...java/com/thealgorithms/stacks/PrefixEvaluator.java	90.47%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5755      +/-   ##
============================================
+ Coverage     64.08%   64.10%   +0.02%     
- Complexity     4186     4196      +10     
============================================
  Files           585      586       +1     
  Lines         16351    16372      +21     
  Branches       3155     3158       +3     
============================================
+ Hits          10478    10495      +17     
- Misses         5447     5449       +2     
- Partials        426      428       +2     

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