3446. Sort Matrix by Diagonals

You are given an n x n square matrix of integers grid. Return the matrix such that: - The diagonals in the bottom-left triangle (including the middle diagonal) are sorted in non-increasing order. - The diagonals in the top-right triangle are sorted in non-decreasing order. Example 1: Input: grid = [[1,7,3],[9,8,2],[4,5,6]] Output: [[8,2,3],[9,6,7],[4,5,1]] Explanation: The diagonals with