38: Add an example showing how to capture a render r=kvark a=paulkernfeld
I had wanted to use wgpu-rs to generate `.png` images rather than displaying to the screen, so I coded up this prototype as an example to others who might want to do something similar.
Possible changes:
- Create an actual `.png` or other image
- Convert this into a unit test
I'm happy to make other modifications to this as well.
Co-authored-by: Paul Kernfeld <paulkernfeld@gmail.com>