Use talhelper to setup a talos

shell.nix

@@ -1,6 +1,10 @@
 {pkgs ? import <nixpkgs> {}}:
 pkgs.mkShell {
   packages = with pkgs; [
+    kubectl
     talosctl
+    talhelper
   ];
+
+  TALOSCONFIG = "./clusterconfig/talosconfig";
 }