fix: Adding testing-library DOM

Author: jherr

templates/base/package.json

@@ -15,6 +15,7 @@
     "react-dom": "^19.0.0"
   },
   "devDependencies": {
+    "@testing-library/dom": "^10.4.0",
     "@testing-library/react": "^16.2.0",
     "@types/react": "^19.0.8",
     "@types/react-dom": "^19.0.3",