Kth Smallest Element in BST

Question:230. Kth Smallest Element in a BST

Given the root of a binary search tree, and an integer k, return the kth smallest value (1-indexed) of all the values of the nodes in the tree.

Approach: Inorder Traversal

Find the kth smallest element in a binary search tree (BST) using an inorder traversal. The `inorder_traversal` function recursively explores the left subtree, decrements the counter `k`, and returns the value of the kth smallest element when `k` becomes 0. If the element is not found in the left subtree, the function explores the right subtree. The method returns the result of the initial call to `inorder_traversal` on the BST's root.

Time and Space Complexity: O(H)

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