Ongoing: additional distro support (WSL, mageia, nix, gentoo)

[balupton]

I've tried adding support for mageia, nix, and gentoo however their CI tests are failing. Happy to accept PRs with their support, as well as support for any other distros.

files of interest:

• https://github.com/bevry/dorothy/blob/master/README.md
• https://github.com/bevry/dorothy/blob/master/.github/workflows/dorothy-workflow.yml
• https://github.com/bevry/dorothy/blob/master/commands/dorothy
• https://github.com/bevry/dorothy/blob/master/commands/setup-linux
• https://github.com/bevry/dorothy/blob/master/commands/setup-util
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-bash
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-devel
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-flatpak
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-jq
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-moreutils
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-ripgrep
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-sd
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-snap
• https://github.com/bevry/dorothy/blob/master/commands/setup-util-teip

nix links of interest:

• https://nixos.wiki/wiki/NixOS_on_ARM#Installation
• https://nixos.org/download.html
• https://nixos.org/manual/nixos/stable/index.html#sec-installation

Commands reportedly failing on WSL:

• [ ] is-admin
• [ ] get-filesystem
• [ ] setup-docker
• [ ] setup-util-obs