provide code script on GitHub has test a WPF application that allows the user to perform the following tasks: 1. Select and load an image. 2. Draw one rectangle or more over the image by clicking and dragging the mouse to draw (the size of the rectangle depends on how much the user drags the mouse) 3. Only allow drawing inside the picture. 4. Change the rectangle's color by clicking each rectangle and selecting a different color from a color palette. 5. Resize the rectangle(s) from any corner or side. 6. Move the rectangle by pressing and holding the rectangle and moving the mouse (drag and drop). 7. Delete any rectangle. 8. Save the changes to a new image. Please provide the whole code and explain it also.