Add API indicator and staging banner (#1563)

* Change text of Modrinth logo depending on the API url being used

* Staging banner

composables/cosmetics.js

@@ -27,6 +27,7 @@ export const useCosmetics = () =>
           user: 'list',
           collection: 'list',
         },
+        hideStagingBanner: false,
       }
     }