Implemented Level order traversal #1392
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Description of Change
Added a detailed implementation of level order traversal, also known as Breadth-First Search (BFS), for a binary tree. The provided code systematically traverses every node in the tree, visiting all nodes at a particular level before moving to the next level. It starts from the root node and explores all of its neighbors at the present depth level before moving to the nodes at the next level.
Checklist
Notes: BFS