Add support for multiple init systems, different filesystems, and multiple drives (and convert it to normie speak)

Hey @MentalOutlaw , this script needs to be adapted to be isomorphic, say if one wants to use multiple drives for example. I run Gentoo using a multi-drive BTRFS as the root, on a UEFI AMD system I built myself. The script needs to support Wayland as well, to accommodate people who don't use window managers. I forked it to try to install Gentoo, and it crashed and burned. I also use systemd as a system manager. The script needs to be highly adaptable, with your rice, of course.