running all the examples

[mockersf]

I wrote a small script that will run most bevy examples (after some small changes to them) sequentially to check for crashes.

Currently, two examples are crashing:

• multiple_windows (introduce error management when updating render graph #1080)
• return_after_run (Fix example return_after_run #1082)

My script adds a system that will exit after 150 frames to all examples, then run all examples except those for wasm, iOS, android.

The script is here: https://github.com/mockersf/bevy/blob/run-examples/.github/workflows/run_examples.sh
I was vaguely hoping to be able to run in from GitHub actions... but that doesn't work because surprisingly there's no compatible gpu there :(

This can take some time, around 10 minutes for a clean compile on my machine, then 10 minutes to run all examples, and a 22Go target folder