[DOCS] Add Comprehensive Linked List Notes and Problem Guide for DSA

[pushpit21jain]

The repository currently lacks a structured and beginner-friendly documentation section for Linked List in Data Structures and Algorithms (DSA).

Linked List is a fundamental topic for coding interviews, placements, and competitive programming, but there are no comprehensive notes covering concepts, implementations, operations, and important interview problems in an organized way.

Adding detailed Linked List documentation would help students understand the topic step-by-step with proper explanations and examples.

Suggested Changes

Add a complete Linked List documentation module including:

Introduction to Linked List
Types of Linked Lists
Singly Linked List
Doubly Linked List
Circular Linked List
Node structure explanation
Traversal operations
Insertion operations
Deletion operations
Searching in Linked List
Reversing a Linked List
Cycle detection (Floyd’s Algorithm)
Finding middle node
Merging linked lists
Important interview problems
Time and Space Complexity tables
Code implementations (Java/C++)
Visual diagrams and dry runs
Quick revision notes / cheat sheet
Practice problems and LeetCode references

Suggested structure:

DSA/
├── LinkedList/
│ ├── introduction.md
│ ├── singly-linked-list.md
│ ├── doubly-linked-list.md
│ ├── circular-linked-list.md
│ ├── important-problems.md
│ ├── cheatsheet.md
│ └── images/

[krishsoni-hub]

Hi @pushkarscripts ,

I would love to take this up and contribute a comprehensive guide on Linked Lists!

My plan for this documentation includes:

• Core Concepts: Detailed notes covering Singly, Doubly, and Circular Linked Lists with clear structural breakdowns.
• Visuals & Complexity: Standardized text representations/diagrams for operations (insertion, deletion, reversal) along with their Time & Space complexities.
• Problem Guide: A curated list of essential DSA problems (like cycle detection, merging lists, and reversing in k-groups) complete with optimized algorithmic approaches.

Could you please assign this issue to me? I can have a well-structured Markdown document ready for review soon!