feat(docs,content,ui): the documentation, twelve modules with the synced config beside the text, search, layers, themes and screenshots; the mock vault as templates

.gitignore

@@ -22,3 +22,10 @@ Thumbs.db
 # Vite
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
+
+# src/content/synced is generated by scripts/sync-content.mjs and committed:
+# the vault is not available at build time
+
+# design context and product notes, not part of the site
+.impeccable/
+/docs/