common: add profiles

I will be migrating each sub-module one by one.

modules/common/default.nix

@@ -11,6 +11,10 @@ let
   allowedClassString = lib.concatStringSep ", " (builtins.map lib.escapeNixString allowedClass);
 in
 {
+  imports = [
+    ./profiles
+  ];
+
   config = {
     assertions = [
       {

modules/common/profiles/default.nix

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