fix: 优化插件的结果处理

model/command/command.py

@@ -64,6 +64,8 @@ class Command:
                     result = await plugin.plugin_instance.run(ame)
                 else:
                     result = await asyncio.to_thread(plugin.plugin_instance.run, ame)
+                if not result:
+                    continue
                 if isinstance(result, CommandResult):
                     hit = result.hit
                     res = result._result_tuple()

type/command.py

@@ -18,7 +18,7 @@ class CommandResult():
     用于在Command中返回多个值
     '''
 
-    def __init__(self, hit: bool, success: bool, message_chain: list, command_name: str = "unknown_command") -> None:
+    def __init__(self, hit: bool, success: bool = False, message_chain: list = [], command_name: str = "unknown_command") -> None:
         self.hit = hit
         self.success = success
         self.message_chain = message_chain