Add plasma-manager back, disable stylix theming for KDE in favour of
plasma-manager options.
Reorganise some config - move GTK settings up to desktop.nix since
they're relevant to anything, move xdg portal config into sway only
since plasma sets up it's own.
Move xarchiver to sway only, using ark on plasma.
Add protonmail-bridge-gui for plasma, set to autostart
Made swayfx the standard, added nixos system-level module to enable
and autostart with greetd; Includes fix for missing session that
should be fixed in later nixpkgs versions
Fixed formatting for waybar workspaces module, wasn't showing active
or empty workspaces correctly
Evie Litherland-Smith