chore: update dependencies and modify build command

- Added postcss and supabase dependencies in package.json
- Reordered dependencies for clarity
- Changed Netlify build command to use nx build for the playground project

Author: jumski

examples/playground/package.json

@@ -22,10 +22,12 @@
     "next": "15.0.3",
     "next-plausible": "^3.12.4",
     "next-themes": "^0.4.3",
+    "postcss": "8.4.49",
     "prettier": "^3.3.3",
     "react": "19.0.0",
     "react-dom": "19.0.0",
-    "sharp": "0.32.6",
-    "typescript": "5.8.3"
+    "supabase": "2.21.1",
+    "typescript": "5.8.3",
+    "sharp": "0.32.6"
   }
 }

netlify.toml

@@ -1,6 +1,6 @@
 [build]
   base    = "examples/playground"
-  command = "pnpm build"
+  command = "pnpm nx build playground"
   publish = ".next"
 
 [[plugins]]