Upgrade wgpu to 24 and egui to 0.31

[raggi]

I'm playing with embedding into an Iced build, where Iced's shader module only provides &Device and &Queue references. This update provides Device::clone() and Queue::clone() for shallow copies, replacing the Arc wrappers, making this integration signature compatible during renderer setup.

[Maximkaaa]

Thanks for the PR. It's nice to have an update that doesn't require rewrite of half the code :-).

Please, fix one little nitpick and clippy warnings and I'll merge it in.

[raggi]

Thanks for the PR. It's nice to have an update that doesn't require rewrite of half the code :-).

Right! Apologies for stealing an easier one 🤣

Please, fix one little nitpick and clippy warnings and I'll merge it in.

Thanks for the review, and for all this code!