Add timerange Support for <NTimePicker />

[jahnli]

This function solves the problem (这个功能解决的问题)

component enhancements

Expected API (期望的 API)

Any time range can be selected

[jahnli]

[07akioni]

Maybe we will do it some times later, since it's a rather complex feature.

[jahnli]

Yes, I also think it's a complicated process, but I've consulted various UI libraries, and the multiple features of dates make it more popular

[07akioni]

Yes, I also think it's a complicated process, but I've consulted various UI libraries, and the multiple features of dates make it more popular

I know, we will do it after features with higher priority is implemented.