MTR Beijing Subway Addon 北京地铁扩展

此版本适配主包内测250820+和正式1.0.4（暂未发布）

• 添加了北京地铁风格站台端门
• 试添加了屏蔽门关闭音效

this version is available on FangSu Blocks beta 250820 and release 1.0.4 (will be released soon)

• add beijing subway screendoor glass-end door
• try to add screendoor close sound