Improvement: Removed main function and increased usability of `PalindromePrime` utility class

[Tanmay-Singh3004]

• [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

Attention: Patch coverage is 83.33333% with 6 lines in your changes missing coverage. Please review.

Project coverage is 66.11%. Comparing base (6ef1f7c) to head (9c2a9a1).

Files with missing lines	Patch %	Lines
...n/java/com/thealgorithms/misc/PalindromePrime.java	83.33%	3 Missing and 3 partials :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5832      +/-   ##
============================================
+ Coverage     65.96%   66.11%   +0.14%     
- Complexity     4386     4403      +17     
============================================
  Files           601      601              
  Lines         16780    16792      +12     
  Branches       3226     3233       +7     
============================================
+ Hits          11069    11102      +33     
+ Misses         5266     5242      -24     
- Partials        445      448       +3     

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