feat(content): migrate interactiveCopy into six typed collections

Move the six remaining bilingual datasets from app.js:160 into Astro
content collections so GuideSelector has data to drive. Mechanical copy
of 178 strings (160 localized pairs + 18 worker array strings) plus
the non-localized fields (status, path, command, score, icon, title,
number). Source field on commonSkills embedded from skillSources to
match the GuideSelectorData contract; if a URL changes, both this
entry and skillSources/<id>.json must be updated. Status kept on trees
even though GuideSelectorData omits it — index.html renders it.

Did not delete interactiveCopy from app.js: legacy page still consumes
it, and verify.mjs still asserts against it. Did not migrate the
labels (data.labels.*) — those live inside render functions in app.js
and belong to 15d.

src/content/skillWorkflow/scaffold.json

@@ -0,0 +1,21 @@
+{
+  "id": "scaffold",
+  "number": "03",
+  "title": { "en": "Choose only useful anatomy", "pt": "Escolha apenas a anatomia útil" },
+  "question": {
+    "en": "What must be instructions, executable, consulted, or copied?",
+    "pt": "O que deve ser instrução, executável, consultado ou copiado?"
+  },
+  "action": {
+    "en": "Keep shared guidance in SKILL.md. Add scripts for repeated deterministic work, references for conditional facts, and assets for generated output.",
+    "pt": "Mantenha orientação comum em SKILL.md. Adicione scripts para trabalho determinístico, referências para fatos condicionais e assets para saída."
+  },
+  "output": {
+    "en": "Smallest folder structure that supports the workflow.",
+    "pt": "A menor estrutura de pastas que sustenta o fluxo."
+  },
+  "proof": {
+    "en": "Every file has a real caller; no placeholder directories.",
+    "pt": "Cada arquivo tem um consumidor real; nenhuma pasta placeholder."
+  }
+}