Add Queue Data Structure Under DSA folder #22
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fixes: #21
Queue: A queue follows the FIFO (First In, First Out) principle. The first element added is the first to be removed. It resembles a line of people where the person who arrives first is served first.
Operations:
enqueue: Add an element to the rear of the queue.
dequeue: Remove the element from the front.
peek: View the element at the front.
isEmpty: Check if the queue is empty.