🥂[demo] add workbench page example.

[Ya2gLu]

General

✏️ Mark the necessary items without changing the structure of the PR template.

• [ ] Pull request template structure not broken

Type

ℹ️ What types of changes does your code introduce?

👉 Put an x in the boxes that apply

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist

ℹ️ Check all checkboxes - this will indicate that you have done everything in accordance with the rules in CONTRIBUTING.

👉 Put an x in the boxes that apply.

• [ ] My code follows the style guidelines of this project
• [ ] Is the code format correct
• [ ] Is the git submission information standard?
• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
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[likui628]

@Ya2gLu 提交记录好复杂，能不能新建一个feat分支重新PR一下

https://github.com/vbenjs/vben3/blob/master/CONTRIBUTING.md#pr-%E6%8C%87%E5%8D%97

[likui628]

看了下，界面很清新。说下几个观点：

1. 提交记录很乱。参考下PR-指南
2. 代码格式化，看下Prettier设置。
3. 样式需要稍微处理下

[Ya2gLu]

好的，我重新搞一下👌