chore(templates): update vercel-ai-sdk overlays to ai v7 and @ai-sdk/openai v4 (#1232)

Co-authored-by: abhin <abhin@thesys.dev>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: devin-ai-integration[bot]

templates/openui-cloud/overlays/vercel-ai-sdk/manifest.json

@@ -3,8 +3,8 @@
   "description": "Vercel AI SDK agent with the selected model backend",
   "packageJson": {
     "dependencies": {
-      "@ai-sdk/openai": "^3.0.91",
-      "ai": "^6.0.246",
+      "@ai-sdk/openai": "^4.0.72",
+      "ai": "^7.0.111",
       "zod": "^4.4.3"
     },
     "removeDependencies": ["openai"]