Wgpu: NodeJS bindings

[kvark]

These would be required in order to run the WebGPU CTS (cc @kainino0x). I wonder if we can auto-generate it from Rust, like we generate C bindings.

[kainino0x]

My thought is that we can share a Node bindings layer, atop a common C interface. It could reduce the amount of work and maintenance here. However, if you can just generate JS bindings that match WebGPU, it would also be good.

[grovesNL]

@kainino0x do you plan to generate bindings from dawn.json or write them manually?

[kainino0x]

So far I have written a few entry points manually. In the long run, I'm hoping to use an easier mechanism (maybe node-ffi if it can possibly work?), but otherwise may try to at least partially generate them from dawn.json.

[GabrielMajeri]

Are there any updates on the Node bindings?

Also, would they be added to this repository, or a separate one like wgpu-native?