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* Update outdated readme info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/src/curve.rs

@@ -4,7 +4,8 @@ use dyn_any::{DynAny, StaticType, StaticTypeSized};
 use std::hash::{Hash, Hasher};
 use std::ops::{Add, Mul, Sub};
 
-#[derive(Debug, Clone, PartialEq, DynAny, specta::Type, serde::Serialize, serde::Deserialize)]
+#[cfg_attr(feature = "wasm", derive(tsify::Tsify))]
+#[derive(Debug, Clone, PartialEq, DynAny, serde::Serialize, serde::Deserialize)]
 pub struct Curve {
 	#[serde(rename = "manipulatorGroups")]
 	pub manipulator_groups: Vec<CurveManipulatorGroup>,
@@ -31,7 +32,8 @@ impl Hash for Curve {
 	}
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, DynAny, specta::Type, serde::Serialize, serde::Deserialize)]
+#[cfg_attr(feature = "wasm", derive(tsify::Tsify))]
+#[derive(Debug, Clone, Copy, PartialEq, DynAny, serde::Serialize, serde::Deserialize)]
 pub struct CurveManipulatorGroup {
 	pub anchor: [f32; 2],
 	pub handles: [[f32; 2]; 2],