also refactor nixos modules

modules/nixos/desktop/plasma/default.nix

@@ -1,48 +0,0 @@
-{
-  pkgs,
-  lib,
-  config,
-  ...
-}: let
-  inherit (lib) mkIf mkEnableOption;
-
-  cfg = config.sneeuwvlok.desktop.plasma;
-in {
-  options.sneeuwvlok.desktop.plasma = {
-    enable =
-      mkEnableOption "Enable KDE Plasma"
-      // {
-        default = config.sneeuwvlok.desktop.use == "plasma";
-      };
-  };
-
-  config = mkIf cfg.enable {
-    environment.plasma6.excludePackages = with pkgs.kdePackages; [
-      elisa
-      kmahjongg
-      kmines
-      konversation
-      kpat
-      ksudoku
-      konsole
-      kate
-      ghostwriter
-      # oxygen
-    ];
-    environment.sessionVariables.NIXOS_OZONE_WL = "1";
-
-    services = {
-      xserver.enable = false;
-
-      desktopManager.plasma6.enable = true;
-
-      displayManager = {
-        defaultSession = "plasma";
-        sddm = {
-          enable = true;
-          wayland.enable = true;
-        };
-      };
-    };
-  };
-}