chore(demo): tailwind basic setup

Author: bukinoshita

apps/demo/package.json

@@ -9,7 +9,7 @@
     "export": "email-dev export"
   },
   "dependencies": {
-    "@react-email/components": "workspace:*",
+    "@react-email/components": "@react-email/[email protected]",
     "react": "^19",
     "react-dom": "^19",
     "email-dev": "workspace:*"
@@ -20,4 +20,4 @@
     "@types/react": "^19",
     "@types/react-dom": "^19"
   }
-}
+}