[FEATURE REQUEST] Add emptty to login managers available

[thealio]

describe the request

Hi,
Recentrly Arch Linux has provided emptty login manager on the official repos:
https://archlinux.org/packages/extra/x86_64/emptty/
https://github.com/tvrzna/emptty

I tried it , and I think is an awesome piece of software , my favorite login manager so far
So, I would like to have it available as a choose on Archinstall

Cheers!

[thealio]

The script $HOME/.emptty or $HOME/.config/emptty has to be created
See https://github.com/tvrzna/emptty/blob/master/SAMPLES.md
This in my own one , it works ok (bash as shell)

#!/usr/bin/env bash
Selection=true
LoginShell=/usr/bin/env bash --login

exec $@