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_test/hm.nix

@@ -0,0 +1,12 @@
+{ ... }:
+{
+  imports = [
+    ../hm
+    ../curacao/options.nix
+  ];
+
+  home.username = "gnix";
+  home.homeDirectory = "/home/gnix";
+
+  frogeye.desktop.nixGLIntel = true;
+}