feat(cli): Complete the check rule catalog

Add D002 (malformed attribute blocks), R004 (skipped declare rows), and V001-V005 (CSV data files). CSV checks run once per referenced file and also cover inline spark-table bodies.

Generate docs/reference.md from the known.ts catalog via npm run gen:reference, and add drift guards asserting the catalog matches the customElement call sites and the committed reference.

scripts/generate-reference.ts

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+/**
+ * Regenerate `docs/reference.md` from the `known.ts` catalog.
+ *
+ *   npm run gen:reference
+ *   npm run gen:reference -- --out ~/.agents/skills/tttk-authoring/reference.md
+ */
+
+import { mkdirSync, writeFileSync } from "fs";
+import { dirname, resolve } from "path";
+import { renderReference } from "../src/cli/validate/reference.js";
+
+function argValue(flag: string): string | undefined {
+  const index = process.argv.indexOf(flag);
+  return index >= 0 ? process.argv[index + 1] : undefined;
+}
+
+const out = resolve(argValue("--out") ?? "docs/reference.md");
+mkdirSync(dirname(out), { recursive: true });
+writeFileSync(out, renderReference(), "utf-8");
+console.log(`wrote ${out}`);