add graph cycle detection algorithm and its unit tests.

[divyanshsaxena002]

• 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 algorithms include a corresponding test class that validates their functionality.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java
• Add my name to the Contributer List, this is my first contribution

[codecov-commenter]

Codecov Report

❌ Patch coverage is 52.38095% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.24%. Comparing base (dc3d64f) to head (6faef1a).

Files with missing lines	Patch %	Lines
...om/thealgorithms/datastructures/graphs/Cycles.java	52.38%	9 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7246      +/-   ##
============================================
+ Coverage     79.12%   79.24%   +0.12%     
  Complexity     6985     6985              
============================================
  Files           784      784              
  Lines         22971    22966       -5     
  Branches       4515     4515              
============================================
+ Hits          18175    18199      +24     
+ Misses         4076     4045      -31     
- Partials        720      722       +2     

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[divyanshsaxena002]

format the style