日期选择框增加自定义渲染功能

[wyangx]

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

What problem does this feature solve?

1.x版本里有这个功能，升到新版却没有了，希望4.x版本也可以有自定义渲染功能，这样可以自定义一个样式来触发时间面板
This function was available in version 1.x, but it is no longer available after upgrading to the new version. I hope version 4.x can also have a custom rendering function, so that a style can be customized to trigger the time panel.

What does the proposed API look like?

同 https://1x.antdv.com/components/date-picker-cn/#components-date-picker-demo-custum-time

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