docs/language: a page for every keyword and attribute the vocabulary has

Keywords: module uses friend export internal numbers unsafe mut port bind action
reducer registry of as from def open alias component prop view (structure),
shows lasts then loads (scenes), system (ecs), dispatch (control), true false
null (operators). Attributes: @Ref @OneOf @Range @Unit @Asset @Color, @Node /
@Clip / @Material, @Tint @Derived, @Text / @Multiline, @Key, @AppendOnly /
@ByKey, @PerMap / @Chunked, @frame @max, @owns / @creates / @releases,
@deterministic @alloc_ok. Each is in tools/docgen/inventory.json; every fence
that is not marked skip parses (ludicc --fmt). annot-clearcolor's token loses its
quotes, which no reader strips.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/language/annotations/annot-node.md

@@ -0,0 +1,12 @@
+---
+id: annot-node
+name: @Node
+category: annotations
+kind: annotation
+tokens: @Node @Clip @Material
+sig: @Node(model) / @Clip(model) / @Material(model) field: string = ""
+tip: A node, an animation clip or a material inside the glTF another field names.
+order: 69
+---
+
+<code>@Node(model)</code>, <code>@Clip(model)</code> and <code>@Material(model)</code> say a string field names a node, a clip or a material inside the glTF that field <code>model</code> of the same record names (an <code>@Asset("gltf")</code> field, or an <code>@Ref</code> to a registry whose record has exactly one). Naming anything else is an error.