home: add a way to differentiate bw laptop and desktop

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

home/modules/laptop.nix

@@ -0,0 +1,9 @@
+{ lib, ... }:
+{
+  options.natto.laptop = lib.mkOption {
+    type = lib.types.bool;
+    default = false;
+    example = true;
+    description = "Whether this device is a laptop or not";
+  };
+}