fix(ci): add @playwright/test to workspace projects so pnpm exec can locate the binary locally

devfront/package.json

@@ -17,6 +17,7 @@
     "test:ui": "playwright test --ui"
   },
   "devDependencies": {
+    "@playwright/test": "^1.60.0",
     "@types/node": "^25.7.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",