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-def.md

@@ -0,0 +1,17 @@
+---
+id: kw-def
+name: def
+category: structure
+kind: keyword
+tokens: def
+sig: def Registry key { field: value, ... }  /  def Registry from "file.lres"
+tip: Entries of a registry, written in code or read from a resource file.
+order: 67
+---
+
+<code>def</code> adds entries to a registry: one written inline, or every entry of a resource file. An <code>open</code> registry takes <code>def</code>s from other modules, which is how a package's table gets a game's rows.
+
+```ludic
+# doc-check: skip — the registry is declared elsewhere
+def Tools lantern { weight: 1.5 }
+```