WIP: update webgpu specifics

[DerKorb]

Not really sure about the usefulness of this. I spent a few hours trying to update various bits of this project to the changes in the WebGPU standard but in the end even though I fixed all occuring errors and warnings nothing gets rendered. Also the compute shaders don't work, as they need to be compiled to WGSL instead of SPIR-V these days. Not sure which of my changes make sense, I'm not very deep into WebGPU or WGSL. Felt like a waste to throw all this away. I was renaming entry points into the shaders to better find out where the warnings and errors were coming from.

[m-schuetz]

Hi, have you checked the "prototyping" branch? This is where the most recent work happened and it works in the latest chrome. There isn't really a public demo yet, though.

[DerKorb]

No, did not see that unfortunately. Guess this PR is even more pointless then facepalm. Thx for the hint.