feat: Enhanced DingTalk toolkit integration - fixes #3050 (#3123)

Co-authored-by: Waleed Alzarooni <waleedalzarooni@outlook.com>
Co-authored-by: waleedalzarooni <waleedalzarooni@users.noreply.github.com>
Co-authored-by: Wendong-Fan <133094783+Wendong-Fan@users.noreply.github.com>

Author: 3 people

camel/toolkits/__init__.py

@@ -41,6 +41,7 @@
 from .slack_toolkit import SlackToolkit
 from .whatsapp_toolkit import WhatsAppToolkit
 from .wechat_official_toolkit import WeChatOfficialToolkit
+from .dingtalk import DingtalkToolkit
 from .twitter_toolkit import TwitterToolkit
 from .open_api_toolkit import OpenAPIToolkit
 from .retrieval_toolkit import RetrievalToolkit
@@ -108,6 +109,7 @@
     'SlackToolkit',
     'WhatsAppToolkit',
     'WeChatOfficialToolkit',
+    'DingtalkToolkit',
     'ImageGenToolkit',
     'TwitterToolkit',
     'WeatherToolkit',