feat: 增加prevent_default和prevent_postorder的支持

plugins/example/__init__.py

@@ -0,0 +1,22 @@
+from pkg.plugin.models import Plugin, PersonMessage, GroupMessage, register
+from pkg.plugin.host import EventContext
+
+
+@register(name="ExamplePlugin", description="用于展示QChatGPT插件支持功能的插件", version="0.0.1", author="RockChinQ")
+class ExamplePlugin(Plugin):
+
+    def __init__(self):
+        pass
+
+    @Plugin.on(PersonMessage)
+    def person_message(self, event: EventContext, **kwargs):
+        print("person_message", kwargs)
+        event.prevent_default()
+
+    @Plugin.on(GroupMessage)
+    def group_message(self, **kwargs):
+        print("group_message", kwargs)
+        self.host.notify_admin("group_message")
+
+    def __del__(self):
+        pass