feat: support multi line input

[mirsella]

Hello !

Would be very useful to have a way of writing multiple lines in an Input.
For example, copying and pasting this text:

foo
bar

Would take only foo.

To know when to stop, maybe we can stop when getting an empty string back, for example with std::io::stdin().read_line(&mut buffer) will return 0 (because it didn't read anything) and not modify buffer.

Thanks !

[ThatFrogDev]

Yes, this would be indeed very awesome! I need that for my app too. Thanks for the request!