added some dev apps and services

system/wm/sddm.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 {
   imports = [
     ./fonts.nix
@@ -13,7 +13,7 @@
     wayland
   ];
 
-  services.displayManager.sddm = {
+  services.displayManager.sddm = lib.mkDefault {
     enable = true;
     wayland.enable = true;
     package = pkgs.sddm;
@@ -26,6 +26,7 @@
       variant = "";
       options = "";
     };
+    dpi = 96;
     excludePackages = [ pkgs.xterm ];
   };
 }