Essentially more sw + GRUB live usb trial

Installed and configured Yggdrasil; ported rustnet and install; GRUB
trial of USB Live stick

modules/userapps/utils.nix

@@ -2,11 +2,9 @@
   config,
   pkgs,
   ...
-}:
-let
+}: let
   rustnet = pkgs.callPackage ../../modules/common/rustnet.nix {};
-in
-{
+in {
   programs.neovim = {defaultEditor = true;};
   environment.systemPackages = with pkgs; [
     parallel-disk-usage