Add tooltip documentation to the Text node and tidy up node catalog categorization (#3645)

* Add more node doc comments

* Tidy up node categories

node-graph/nodes/gcore/src/context_modification.rs

@@ -10,7 +10,7 @@ use raster_types::{CPU, GPU, Raster};
 
 /// Filters out what should be unused components of the context based on the specified requirements.
 /// This node is inserted by the compiler to "zero out" unused context components.
-#[node_macro::node(category("Internal"))]
+#[node_macro::node(category(""))]
 async fn context_modification<T>(
 	ctx: impl Ctx + CloneVarArgs + ExtractAll,
 	/// The data to pass through, evaluated with the stripped down context.

node-graph/nodes/gcore/src/ops.rs

@@ -7,17 +7,17 @@ pub use core_types::ops::TypeNode;
 // TODO: Rename to "Passthrough" and make this the node that users use, not the one defined in document_node_definitions.rs
 /// Passes-through the input value without changing it.
 /// This is useful for rerouting wires for organization purposes.
-#[node_macro::node(skip_impl)]
+#[node_macro::node(category(""), skip_impl)]
 fn identity<'i, T: 'i + Send>(value: T) -> T {
 	value
 }
 
-#[node_macro::node(skip_impl)]
+#[node_macro::node(category(""), skip_impl)]
 fn into<'i, T: 'i + Send + Into<O>, O: 'i + Send>(_: impl Ctx, value: T, _out_ty: PhantomData<O>) -> O {
 	value.into()
 }
 
-#[node_macro::node(skip_impl)]
+#[node_macro::node(category(""), skip_impl)]
 async fn convert<'i, T: 'i + Send + Convert<O, C>, O: 'i + Send, C: 'i + Send>(ctx: impl Ctx + ExtractFootprint, value: T, converter: C, _out_ty: PhantomData<O>) -> O {
 	value.convert(*ctx.try_footprint().unwrap_or(&Footprint::DEFAULT), converter).await
 }