Implement Queue using a Singly Linked List #18
Description
DataStructures: Foundational Structure
Goal: Create a Queue class implementation using a custom Singly Linked List (not Java's built-in LinkedList). It must include the core methods: enqueue(), dequeue(), and peek().
Folder: DataStructures
Technical Notes: The methods enqueue and dequeue should both operate in O(1) time complexity.
Style Requirement: Ensure all classes and methods follow the 4-space indentation and K&R brace style.