Added: Tarjan's SCC algorithm and test cases

[vedas-dixit]

Pull Request Title:

 Know more

Description of the Change:

I’ve implemented Tarjan’s Algorithm for finding Strongly Connected Components (SCC) in a directed graph, and added test cases to ensure correctness. This algorithm uses a depth-first search (DFS) approach and provides an efficient solution for identifying SCCs.

What did I do?

• Implemented Tarjan's SCC algorithm.
• Created test cases for validating the algorithm's correctness.
• Ensured edge cases are covered in the test cases.

Checklist:

• [*] I have read the CONTRIBUTING.md guidelines.
• [*] This pull request is my own work and I have not plagiarized.
• [*] I understand that pull requests will not be merged if they fail the automated tests.
• [*] This PR only modifies the algorithm file related to Tarjan’s SCC.
• [*] All new files follow the UpperCamelCase naming convention (e.g., TarjanSCC.js).
• [*] I’ve linked any algorithm-related references or explanations in the comments.

Let me know if any adjustments are needed!

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 98.16514% with 2 lines in your changes missing coverage. Please review.

Project coverage is 85.94%. Comparing base (1d252d7) to head (ae3b7fb).

Files with missing lines	Patch %	Lines
Graphs/TarjanSCC.js	98.16%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1774      +/-   ##
==========================================
+ Coverage   85.87%   85.94%   +0.06%     
==========================================
  Files         377      378       +1     
  Lines       19720    19829     +109     
  Branches     3005     3028      +23     
==========================================
+ Hits        16935    17042     +107     
- Misses       2785     2787       +2     

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[vedas-dixit]

@appgurueu can you please review my pr and give feedback.
thanks.