🐛 fix: use turbo build pipeline to resolve workspace packages on Vercel

The previous buildCommand ran next build directly without building
workspace packages first. Since dist/ is gitignored, all 18
@react-native-vibe-code/* packages failed to resolve on fresh clones.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: bidah

vercel.json

@@ -1,5 +1,5 @@
 {
-  "buildCommand": "pnpm run build:force",
+  "buildCommand": "pnpm turbo run build --filter=@react-native-vibe-code/web --force",
   "installCommand": "pnpm install",
   "framework": "nextjs",
   "outputDirectory": "apps/web/.next",