refactor: Remove 'main', add tests in TurkishToLatinConversion

[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

All modified and coverable lines are covered by tests ✅

Project coverage is 67.27%. Comparing base (d85f192) to head (b35b5b3).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5944      +/-   ##
============================================
+ Coverage     67.21%   67.27%   +0.05%     
- Complexity     4563     4565       +2     
============================================
  Files           620      620              
  Lines         17147    17141       -6     
  Branches       3309     3309              
============================================
+ Hits          11526    11531       +5     
+ Misses         5165     5154      -11     
  Partials        456      456              

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