Refactor the TypeScript data flow for full type safety and auto-generation of Rust types (#3865)

* Migrate Specta to Tsify to auto-generate messages.ts, working except colors and widgets

* Adopt the generated FillColor/Color/GradientStops

* Fix widget typing

* Separate WidgetGroup enum variants into wrapper structs

* Small rename

* Simplify widgets further

* Clean up message type references

* Switch type imports to the auto-generated file

* Remove lowercase serde rename

* Fix FillChoice deserialization

* Fix small regression from #3837

* Improve type safety

* Make WidgetSpan type-safe

* More cleanup and type safety

* More type safety

* More type safety

* Get the rest to type-check without errors; improve widget builder macro to have optional icons; improve Svelte 5 configs

* Cargo fmt

* Fix imports

* Update outdated readme info

* Fix lint command rename references

* Fix typos

* One more typos fix

* Remove unnecessary dep: prefix from the edited Cargo.toml files

* Remove excess parts from Cargo.toml

* Fix compiling on desktop

* Revert "Remove excess parts from Cargo.toml"

This reverts commit 6b711117b3a5d5d8a3ee20f36a43bc74930b7c82.

* Update dev docs with simpler, more accurate instructions

node-graph/nodes/raster/Cargo.toml

@@ -11,11 +11,7 @@ workspace = true
 
 [features]
 default = ["std"]
-shader-nodes = [
-	"std",
-	"dep:raster-nodes-shaders",
-	"dep:wgpu-executor",
-]
+shader-nodes = ["std", "dep:raster-nodes-shaders", "dep:wgpu-executor"]
 std = [
 	"dep:core-types",
 	"dep:dyn-any",
@@ -27,9 +23,15 @@ std = [
 	"dep:rand_chacha",
 	"dep:fastnoise-lite",
 	"dep:serde",
-	"dep:specta",
 	"dep:kurbo",
 ]
+wasm = [
+	"core-types/wasm",
+	"raster-types/wasm",
+	"vector-types/wasm",
+	"tsify",
+	"wasm-bindgen",
+]
 
 [dependencies]
 # Local dependencies
@@ -52,7 +54,6 @@ num-traits = { workspace = true }
 num_enum = { workspace = true }
 
 # Workspace std dependencies
-specta = { workspace = true, optional = true }
 image = { workspace = true, optional = true }
 ndarray = { workspace = true, optional = true }
 rand = { workspace = true, optional = true }
@@ -61,6 +62,10 @@ fastnoise-lite = { workspace = true, optional = true }
 serde = { workspace = true, optional = true }
 kurbo = { workspace = true, optional = true }
 
+# Workspace wasm dependencies
+tsify = { workspace = true, optional = true }
+wasm-bindgen = { workspace = true, optional = true }
+
 [dev-dependencies]
 tokio = { workspace = true }
 futures = { workspace = true }