Get The Width And Height Of An Image With ImageMagick In Rust

This is the process I'm using to get the width and height of images for a project I'm working on. It uses ImageMagick instead of the `image`` crate. I'm using it because it's considerably faster.

That call is for the height. Changing `%h`` to `%w`` provides with width.

Speedy image dimensions in Rust with ImageMagick