add customfonts custom package

nixos/gui-pkgs.nix

@@ -21,6 +21,7 @@ let
     libnotify
     hoppscotch
   ];
+  customfonts = pkgs.callPackage ../packages/customfonts.nix { inherit pkgs; };
 in
 {
   environment.systemPackages = lib.lists.unique (kdePackages ++ packages);
@@ -44,6 +45,7 @@ in
   programs.partition-manager.enable = true;
 
   fonts.packages = with pkgs; [
+    customfonts
     corefonts
     nerd-fonts.fira-code
   ];