fix: add outputDirectory for Vercel monorepo deploy

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: abrichr

apps/web/vercel.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "https://openapi.vercel.sh/vercel.json",
+  "framework": "nextjs",
+  "installCommand": "cd ../.. && pnpm install",
+  "buildCommand": "cd ../.. && pnpm turbo run build --filter=@wright/web...",
+  "outputDirectory": "apps/web/.next"
+}