支持子分类[Feature] Xxx

[zhangyiteng]

yapi官方已经支持了yapi的二级分类，什么时候可以支持下呢

[tangcent]

@zhangyiteng 你的图裂了。另外官方提交记录里似乎没有关于支持二级分类的commit。
https://github.com/YMFE/yapi/commits/master/

[github-actions]

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