add Overseerr widget

src/utils/api-helpers.js

@@ -10,6 +10,7 @@ const formats = {
   portainer: `{url}/api/endpoints/{env}/{endpoint}`,
   rutorrent: `{url}/plugins/httprpc/action.php`,
   jellyseerr: `{url}/api/v1/{endpoint}`,
+  overseerr: `{url}/api/v1/{endpoint}`,
   ombi: `{url}/api/v1/{endpoint}`,
   npm: `{url}/api/{endpoint}`,
 };