feat(多人游戏): 添加多人游戏状态管理和服务器配置功能

- 新增 MultiplayerState 类管理连接状态和服务器操作
- 在 Starter 面板中添加服务器配置和状态显示
- 实现服务器启动和最大玩家数设置功能

scripts/Tools/Managers/MultiplayerState.gd

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+class_name MultiplayerState
+
+enum ConnectionState {
+	DISCONNECTED,
+	CONNECTING,
+	CONNECTED_HOST,
+	CONNECTED_CLIENT,
+}
+static var stateTextMap = {
+	ConnectionState.DISCONNECTED: "未连接到服务器。",
+	ConnectionState.CONNECTING: "连接中...",
+	ConnectionState.CONNECTED_HOST: "服务器启动成功！",
+	ConnectionState.CONNECTED_CLIENT: "已连接到服务器！",
+}
+static var stateColorMap = {
+	ConnectionState.DISCONNECTED: Color.RED,
+	ConnectionState.CONNECTING: Color.YELLOW,
+	ConnectionState.CONNECTED_HOST: Color.GREEN,
+	ConnectionState.CONNECTED_CLIENT: Color.GREEN,
+}
+
+static var state: ConnectionState = ConnectionState.DISCONNECTED
+static var isMultiplayer: bool = false
+
+static var maxPlayer: int = 10
+
+static func launchServer(port: int):
+	isMultiplayer = true
+	var peer = ENetMultiplayerPeer.new()
+	peer.create_server(port, maxPlayer)
+	return peer

scripts/Tools/Managers/MultiplayerState.gd.uid

@@ -0,0 +1 @@
+uid://ec6qkbh82cf