Implement experimental WebGPU support (#1238)

* Web gpu execution MVP

Ready infrastructure for wgpu experimentation

Start implementing simple gpu test case

Fix Extract Node not working with nested networks

Convert inputs for extracted node to network inputs

Fix missing cors headers

Feature gate gcore to make it once again no-std compatible

Add skeleton structure gpu shader

Work on gpu node graph output saving

Fix Get and Set nodes

Fix storage nodes

Fix shader construction errors -> spirv errors

Add unsafe version

Add once cell node

Web gpu execution MVP

node-graph/wgpu-executor/src/context.rs

@@ -11,7 +11,7 @@ pub struct Context {
 impl Context {
 	pub async fn new() -> Option<Self> {
 		// Instantiates instance of WebGPU
-		let instance = wgpu::Instance::new(wgpu::Backends::all());
+		let instance = wgpu::Instance::new(wgpu::InstanceDescriptor::default());
 
 		// `request_adapter` instantiates the general connection to the GPU
 		let adapter = instance.request_adapter(&wgpu::RequestAdapterOptions::default()).await?;