feat(vbenComponents): 更新Scrollbar滚动条组件，添加滚动指定位置事件

[13982720426]

feat: 滚动条组件添加了scrollTo和scrollBottom方法

后续 滚动组件函数示例页面(已完成) 会用上，先单独提一个PR，不然一次提交太多文件 不好回滚

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