Implement the of Rotate Image

[Suchit1938]

You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise).

You have to rotate the image which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation.

Constraints:

1. n == matrix.length == matrix[i].length
2. 1 <= n <= 20
3. -1000 <= matrix[i][j] <= 1000

[Suchit1938]

Plz, assign the issue to me and also add tag of hacktoberfest.