feat(modules/unfree): unfree core module

feat(roles/shell): move some packages here

feat(roles/qutebrowser, hosts/arwen): qutebrowser role and add to arwen

feat(roles/steam, hosts/arwen): steam role and enable for arwen

feat(roles/hyprland): bemenu in systemPackages

feat: hyprland, kitty, shell env

feat: restructure

feat: initial version