fix(多人游戏): 修复玩家实体与UI状态同步问题

修复多人游戏中玩家实体与UI状态不同步的问题，现在当玩家名称匹配时会自动设置UIState.player
移除单机游戏中重复设置UIState.player的代码
为WorldManager添加对象解析功能以支持多人游戏中的对象传输

scripts/Statemachine/EntityBase.gd

@@ -117,6 +117,8 @@ func _ready():
 		statebar = selfStatebar
 		statebar.entity = self
 	if isPlayer():
+		if displayName == MultiplayerState.playerName:
+			UIState.player = self
 		for i in weaponStore.get_children():
 			i.hide()
 			weapons.append(i)