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/structure/kw-registry.md

@@ -0,0 +1,18 @@
+---
+id: kw-registry
+name: registry
+category: structure
+kind: keyword
+tokens: registry
+sig: [open] registry Name of Record [as PREFIX] [from "file.lres"]
+tip: A table of named entries of one record type, with a constant per entry.
+order: 63
+---
+
+A <code>registry</code> is a table of named entries of one record: its entries come from <code>def</code> declarations or a resource file named by <code>from</code>, and <code>as P</code> generates a constant <code>P_KEY</code> per entry holding its index. Editors read it through <code>ludic schema</code>, and attributes such as <code>@AppendOnly</code> and <code>@PerMap</code> say how its entries may change and where they live.
+
+```ludic
+# doc-check: skip — the file it names is beside the example
+property Tool { key: string = "", weight: float = 0.0 }
+registry Tools of Tool as TL from "data/tools.lres"
+```