flake: add profiles folder

This will be used for configurations that either consolidates multiple options
that make sens to use together, or span accross system and home configuration.

profiles/default.nix

@@ -0,0 +1,7 @@
+# Configuration that spans accross system and home, or are almagations of modules
+{ ... }:
+{
+  imports = [
+    # FIXME
+  ];
+}