fix: provide a response to setShipFavouriteLoadout

Seems to be the same format as the request, so just mirror it back. This is so the client knows we acknowledged the change as it won't resync the ship until the next login.

src/controllers/api/setShipFavouriteLoadoutController.ts

@@ -20,7 +20,7 @@ export const setShipFavouriteLoadoutController: RequestHandler = async (req, res
         throw new Error(`unexpected BootLocation: ${body.BootLocation}`);
     }
     await personalRooms.save();
-    res.json({});
+    res.json(body);
 };
 
 interface ISetShipFavouriteLoadoutRequest {