Reorganize configuration root

While I might still bikeshed how the rest of the configuration is
sourced, at least the import points should be stable.

curacao/hardware.nix

@@ -0,0 +1,8 @@
+{ lib, ... }:
+{
+  imports = [
+    "${builtins.fetchTarball "https://github.com/NixOS/nixos-hardware/archive/468a7a108108908c7a35d6549f1e1f0236a9448a.tar.gz"}/dell/g3/3779"
+  ];
+
+  boot.loader.efi.canTouchEfiVariables = lib.mkDefault true;
+}