Feature: Allow creating sub folders with `/` in new folder dialog

### What feature or improvement do you think would benefit Files?

It would be great if, rather than displaying a warning meant to prevent one from entering a folder name containing folder separation characters, Files could instead parse the inputted string and create nested folders as needed.

### Requirements

Given how the batch command `mkdir` already features support for this, a potential solution could be to simply call it and pass the string as an argument.

### Files Version

3.5.0.0

### Windows Version

10.0.19045.2788

### Comments

I do not understand why this wasn't chosen over the implementation of an entire warning popup, although that is certainly better than what happens when forward slashes are part of the string, where, instead of displaying the aforementioned popup, it will simply grey out the confirmation button without any explanation.