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

node-graph/wgpu-executor/Cargo.toml

@@ -12,6 +12,7 @@ default = []
 [dependencies]
 graphene-core = { path = "../gcore", features = ["async", "std", "alloc", "gpu"] }
 graph-craft = {path = "../graph-craft" }
+gpu-executor = { path = "../gpu-executor" }
 dyn-any = { path = "../../libraries/dyn-any", features = ["log-bad-types", "rc", "glam"] }
 future-executor = { path = "../future-executor" }
 num-traits = "0.2"