Restructure GPU execution to model GPU pipelines in the node graph (#1088)

* Start implementing GpuExecutor for wgpu

* Implement read_output_buffer function

* Implement extraction node in the compiler

* Generate type annotations during shader compilation

* Start adding node wrapprs for graph execution api

* Wrap more of the api in nodes

* Restructure Pipeline to accept arbitrary shader inputs

* Adapt nodes to new trait definitions

* Start implementing gpu-compiler trait

* Adapt shader generation

* Hardstuck on pointer casts

* Pass nodes as references in gpu code to avoid zsts

* Update gcore to compile on the gpu

* Fix color doc tests

* Impl Node for node refs

Cargo.toml

@@ -15,6 +15,7 @@ members = [
 	"node-graph/compilation-client",
 	"node-graph/vulkan-executor",
 	"node-graph/wgpu-executor",
+	"node-graph/gpu-executor",
 	"node-graph/future-executor",
 	"node-graph/gpu-compiler/gpu-compiler-bin-wrapper",
 	"libraries/dyn-any",