[pro:transfer] 期望@idux/pro不引用@idux/components/_private的东西

[brenner8023]

• [x] I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

https://github.com/IDuxFE/idux

Steps to reproduce

打开idux仓库，查看packages/pro/transfer的源码

What is expected?

没有引用@idux/components/_private的东西

What is actually happening?

存在引用@idux/components/_private的文件

packages/pro/transfer/src/ProTransfer.tsx
packages/pro/transfer/src/token.ts
packages/pro/transfer/src/content/ProTransferList.tsx
packages/pro/transfer/src/content/ProTransferTable.tsx
packages/pro/transfer/src/content/ProTransferTree.tsx

Environment Info

Browsers:
    Internet Explorer: 11.0.18362.1

[danranVm]

@sallerli1 是不是可以把 ChechableList 移动到 transfer 目录里？然后 export 出去给 Pro 用。