feat: 为MultiplayerState添加@tool注解并更新状态显示格式

为MultiplayerState类添加@tool注解以支持编辑器功能
在Starter面板中为连接状态文本添加"状态："前缀

scripts/Contents/Panels/Starter.gd

@@ -34,5 +34,5 @@ func _physics_process(_delta):
 
 func setState(state: MultiplayerState.ConnectionState):
 	MultiplayerState.state = state
-	connectionState.text = MultiplayerState.stateTextMap[state]
+	connectionState.text = "状态：%s" % MultiplayerState.stateTextMap[state]
 	connectionState.modulate = MultiplayerState.stateColorMap[state]

scripts/Tools/Managers/MultiplayerState.gd

@@ -1,3 +1,4 @@
+@tool
 class_name MultiplayerState
 
 enum ConnectionState {