Add ember-cli as dev dependency

So we can run generators etc.

package.json

@@ -60,6 +60,7 @@
     "babel-plugin-ember-template-compilation": "^3.0.1",
     "concurrently": "^9.2.1",
     "decorator-transforms": "^2.3.1",
+    "ember-cli": "^6.10.0",
     "ember-cli-deprecation-workflow": "^4.0.0",
     "ember-modifier": "^4.2.2",
     "ember-page-title": "^9.0.3",