[Migrated] Improve documentation to include visual of what example app should look like?

Issue automatically imported from old repo: https://github.com/EmbarkStudios/rust-gpu/issues/1108
Old labels: t: enhancement
Originally creatd by JulianKnodt on 2023-12-16T19:14:48Z

I was hoping to learn how to write rust-gpu shaders, so I was going through the tutorial, and have to run the CPU version on my old mac air.

I think for rendering, it may be useful to include images, as I'm not sure if this output looks correct:

Specifically it may be useful to include an image after the initial build steps to make sure that it's running correctly.

Parti dai passaggi iniziali di build del tutorial e dall’output dell’app di esempio descritto nell’issue, usando l’immagine fornita come riferimento. Aggiorna la documentazione pertinente del tutorial con un elemento visivo che mostri il rendering previsto dopo il build iniziale, in modo che i lettori possano verificare che il loro esempio sia in esecuzione correttamente.