Shaders: rust-gpu integration to compile shader nodes to WGSL (#3097)

* shaders: shader compilation setup

* nix: use rustc_codegen_spirv.so from nix

* shaders: codegen for per_pixel_adjust shader nodes

* shaders: disable nodes needing bool

* shaders: `#[repr(u32)]` some enums

* shaders: add lint ignores from rust-gpu

* shaders: fix node-macro tests

* gcore-shaders: toml cleanup

* shader-nodes feature: put rust-gpu to wgsl compile behind feature gate

* shaders: fix use TokenStream2

* shaders: allow providing shader externally

* Update iai runner in workflow

---------

Co-authored-by: Timon Schelling <me@timon.zip>
Co-authored-by: Dennis Kobert <dennis@kobert.dev>

node-graph/graster-nodes/Cargo.toml

@@ -6,8 +6,18 @@ description = "graphene raster data format"
 authors = ["Graphite Authors <contact@graphite.rs>"]
 license = "MIT OR Apache-2.0"
 
+[lib]
+crate-type = ["rlib", "dylib"]
+
+[lints]
+workspace = true
+
 [features]
 default = ["std"]
+shader-nodes = [
+	"std",
+	"dep:graphene-raster-nodes-shaders",
+]
 std = [
 	"dep:graphene-core",
 	"dep:dyn-any",
@@ -19,8 +29,6 @@ std = [
 	"dep:serde",
 	"dep:specta",
 	"dep:kurbo",
-	"glam/debug-glam-assert",
-	"glam/serde",
 ]
 
 [dependencies]
@@ -31,10 +39,12 @@ node-macro = { workspace = true }
 # Local std dependencies
 dyn-any = { workspace = true, optional = true }
 graphene-core = { workspace = true, optional = true }
+graphene-raster-nodes-shaders = { path = "./shaders", optional = true }
 
 # Workspace dependencies
 bytemuck = { workspace = true }
 glam = { workspace = true }
+spirv-std = { workspace = true }
 num-traits = { workspace = true }
 
 # Workspace std dependencies