add dingtalk file support, fix video/voice file to bailian (#1683)

* add dingtalk file support, fix video/voice file to bailian

* fix bailian files conversation

* 更新 bailianchatcmpl.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update libs/dingtalk_api/api.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* chore: bump langbot-plugin version to 0.1.3b1

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Junyan Qin <rockchinq@gmail.com>

libs/dingtalk_api/dingtalkevent.py

@@ -31,6 +31,15 @@ class DingTalkEvent(dict):
     def audio(self):
         return self.get('Audio', '')
 
+    @property
+    def file(self):
+        return self.get('File', '')
+
+    @property
+    def name(self):
+        return self.get('Name', '')
+
+
     @property
     def conversation(self):
         return self.get('conversation_type', '')