cleanup: remove obsolete waybar and walker CSS templates

hosts/live-iso.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, inputs, ... }:
+{ config, pkgs, inputs, lib, ... }:
 
 {
   environment.systemPackages = with pkgs; [
@@ -14,6 +14,9 @@
     })
   ];
 
+  # Ensure the live environment user has the necessary groups for graphical acceleration and audio
+  users.users.nixos.extraGroups = [ "wheel" "video" "render" "audio" "networkmanager" ];
+
   environment.etc."install-nomarchy.sh" = {
     source = ../installer/install-nomarchy.sh;
     mode = "0755";