added support for custom addon collections

app/lib/core/routing/routes.settings.dart

@@ -47,6 +47,12 @@ part of 'routes.dart';
     TypedGoRoute<DeveloperSettingsRoute>(
       name: 'DeveloperSettingsRoute',
       path: 'developer',
+      routes: [
+        TypedGoRoute<AddonCollectionRoute>(
+          name: 'AddonCollectionRoute',
+          path: 'addon_collection',
+        ),
+      ],
     ),
   ],
 )
@@ -85,6 +91,13 @@ class DeveloperSettingsRoute extends GoRouteData with $DeveloperSettingsRoute {
   }
 }
 
+class AddonCollectionRoute extends GoRouteData with $AddonCollectionRoute {
+  @override
+  Widget build(BuildContext context, GoRouterState state) {
+    return const AddonCollectionScreen();
+  }
+}
+
 class WebEngineHardeningRoute extends GoRouteData
     with $WebEngineHardeningRoute {
   @override