Create MiddleOfLinkedList.java

[AYAZ2006]

• 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

❌ Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.65%. Comparing base (e6cb96f) to head (4f24c0b).

Files with missing lines	Patch %	Lines
...ithms/datastructures/lists/MiddleOfLinkedList.java	0.00%	26 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6653      +/-   ##
============================================
- Coverage     75.74%   75.65%   -0.10%     
- Complexity     5771     5772       +1     
============================================
  Files           702      703       +1     
  Lines         19770    19796      +26     
  Branches       3832     3834       +2     
============================================
+ Hits          14975    14976       +1     
- Misses         4215     4241      +26     
+ Partials        580      579       -1     

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[DenizAltunkapan]

@AYAZ2006 Please add the missing test class for your algorithm in this pr. Thank you!