Add support for stickers in messages

The sticker name and description will be now forwarded
with the rest of the message content.

src/toOpenAIMessages.ts

@@ -31,7 +31,14 @@ export function formatMessage(message: DiscordMessage): string {
     rvalue += "]";
   }
 
-  return rvalue;
+  for (const sticker of message.stickers.values()) {
+    rvalue += ` [Sticker:`;
+    rvalue += sticker.name;
+    rvalue += sticker.description ? ` - ${sticker.description}` : "";
+    rvalue += "]";
+  }
+
+  return rvalue.trim();
 }
 
 /**