macbook: disable touchpad while typing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

settings/hyprland.nix

@@ -146,6 +146,7 @@ in
                 tap_to_click = true;
                 tap_button_map = "lrm";
                 natural_scroll = true;
+                disable_while_typing = true;
               };
             };