feat(保存系统): 实现游戏存档功能

添加SaveEngine类用于处理游戏存档的序列化、加载和应用
修改GameBusManager在游戏重启时自动保存和加载存档
扩展JsonTool功能以支持文件解析和字符串序列化
更新StarterPanel添加教程观看状态保存

scripts/Tools/Managers/GameBusManager.gd

@@ -1,5 +1,12 @@
 class_name GameBusManager
 
+static func _static_init():
+	init()
+
+static func init():
+	var save = SaveEngine.load()
+	if save:
+		SaveEngine.apply(save)
 static func restart(tree: SceneTree):
 	for bullet in tree.get_nodes_in_group("bullets"):
 		bullet.queue_free()
@@ -14,6 +21,7 @@ static func restart(tree: SceneTree):
 	OutGameStorage.saveInventory()
 	CameraManager.shakeStop()
 	WorldManager.timeRestart()
+	SaveEngine.save()
 	StarterPanel.selectingFeed = true
 
 	UIState.setPanel("Starter")