move to pnpm workspace

playground/package.json

@@ -1,19 +0,0 @@
-{
-  "name": "playground",
-  "private": true,
-  "scripts": {
-    "build": "nuxt build",
-    "dev": "nuxt dev",
-    "generate": "nuxt generate",
-    "preview": "nuxt preview",
-    "postinstall": "nuxt prepare"
-  },
-  "dependencies": {
-    "superjson": "^1.11.0",
-    "trpc-nuxt": "workspace:*",
-    "zod": "^3.19.1"
-  },
-  "devDependencies": {
-    "nuxt": "3.0.0-rc.12"
-  }
-}