Comprehensive Documentation Update and Repository Refactor

[ppant]

This PR provides a major overhaul of the repository's documentation and structure.

Key Changes:

1. Documentation:
   • Root README.md: Fully updated with a professional layout, comprehensive Table of Contents, project structure overview, and a quick reference guide with complexity analysis.
   • Subdirectory READMEs: Each of the 10 major directories now contains a README.md file listing all its scripts with their respective time complexities using LaTeX notation.
2. Repository Refactor:
   • Naming Conventions: Renamed directories (deque -> Deque, Error-debug -> ErrorHandling) and many files from snake_case to PascalCase to align with a consistent project-wide standard.
   • Typo Fixes: Corrected BalanceParenthlessCheckImple.py to BalanceParenthesesCheckImple.py.
3. Code Improvements:
   • Cycle Detection: Refactored LinkedLists/SinglyLinkedListCycleCheckImple.py to use an idiomatic instance method (cycle_check(self)) and added automated test scenarios for both cyclic and acyclic lists.
4. Verification:
   • Performed a full audit of all 50 Python scripts.
   • Verified successful execution of all 49 non-interactive scripts under Python 3.
   • Validated all internal and relative markdown links across the repository.

This update transforms the repository into a more professional and accessible resource for learning Data Structures and Algorithms in Python.

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PR created automatically by Jules for task 4259579047891859584 started by @ppant

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