Adding ability to listen to user types chat messages using WA.onChatMessage

front/src/Api/Events/ChatEvent.ts

@@ -5,4 +5,7 @@ export const isChatEvent =
         message: tg.isString,
         author: tg.isString,
     }).get();
+/**
+ * A message sent from the iFrame to the game to add a message in the chat.
+ */
 export type ChatEvent = tg.GuardedType<typeof isChatEvent>;