Shaders: add gcore-shaders and make graster-nodes no-std (#2925)

* gcore-shaders: add crate, move `color` and `blending` from gcore

* gcore-shaders: move `AsU32`

* gcore-shaders: move `ChoiceType`, switch `Cow` for `&str`, adjust node macro

* gcore-shaders: move `registry::types`

* gcore-shaders: move `context::Ctx`

* raster-nodes: make it `no_std` with `std` feature

* gcore-shaders: fix doctest

Cargo.lock

@@ -1527,6 +1527,7 @@ version = "0.29.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8babf46d4c1c9d92deac9f7be466f76dfc4482b6452fc5024b5e8daf6ffeb3ee"
 dependencies = [
+ "libm",
  "serde",
 ]
 
@@ -1695,12 +1696,11 @@ dependencies = [
  "ctor",
  "dyn-any",
  "glam",
- "half",
+ "graphene-core-shaders",
  "image",
  "kurbo",
  "log",
  "node-macro",
- "num-derive",
  "num-traits",
  "parley",
  "petgraph 0.7.1",
@@ -1716,6 +1716,22 @@ dependencies = [
  "wgpu",
 ]
 
+[[package]]
+name = "graphene-core-shaders"
+version = "0.1.0"
+dependencies = [
+ "bytemuck",
+ "dyn-any",
+ "glam",
+ "graphene-core",
+ "half",
+ "log",
+ "num-derive",
+ "num-traits",
+ "serde",
+ "specta",
+]
+
 [[package]]
 name = "graphene-math-nodes"
 version = "0.1.0"
@@ -1754,6 +1770,7 @@ dependencies = [
  "futures",
  "glam",
  "graphene-core",
+ "graphene-core-shaders",
  "image",
  "ndarray",
  "node-macro",