feat: better modules aragement.

modules/nixos/sddm.nix

@@ -1,30 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}: {
-  options = {
-    crony.sddm.enable = lib.mkEnableOption "Enable sddm.";
-  };
-
-  config = lib.mkIf config.crony.sddm.enable {
-    environment.systemPackages = [
-      (pkgs.where-is-my-sddm-theme.override {
-        variants = ["qt6" "qt5"];
-        themeConfig.General = {
-          showSessionsByDefault = true;
-
-          background = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
-          backgroundFill = "#282828";
-          backgroundMode = "none";
-        };
-      })
-    ];
-    services.displayManager.sddm = {
-      enable = true;
-      wayland.enable = true;
-      theme = "where_is_my_sddm_theme_qt5";
-    };
-  };
-}