Refactor: Remove unclean modules/packages directive

modules/system/basic.nix

@@ -1,6 +1,13 @@
 { pkgs, ... }:
 
 {
+  programs.zsh.enable = true;
+
+  programs.nh = {
+    enable = true;
+    flake = "/nix/config";
+  };
+
   environment.systemPackages = with pkgs; [
     fastfetch
     wget

modules/system/virtualisation.nix

@@ -0,0 +1,6 @@
+{ ... }:
+
+{
+  virtualisation.libvirtd.enable = true;
+  programs.virt-manager.enable = true;
+}