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/gpu-executor/Cargo.toml

@@ -0,0 +1,36 @@
+[package]
+name = "gpu-executor"
+version = "0.1.0"
+edition = "2021"
+license = "MIT OR Apache-2.0"
+
+[features]
+default = []
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+graphene-core = { path = "../gcore", features = [
+	"async",
+	"std",
+	"alloc",
+	"gpu",
+] }
+graph-craft = { path = "../graph-craft", features = ["serde"] }
+node-macro = { path = "../node-macro" }
+dyn-any = { path = "../../libraries/dyn-any", features = [
+	"log-bad-types",
+	"rc",
+	"glam",
+] }
+num-traits = "0.2"
+log = "0.4"
+serde = { version = "1", features = ["derive", "rc"] }
+glam = "0.22"
+base64 = "0.13"
+
+bytemuck = { version = "1.8" }
+anyhow = "1.0.66"
+spirv = "0.2.0"
+futures-intrusive = "0.5.0"
+futures = "0.3.25"