feat(sway): install wlr-randr on all Sway hosts

wlr-randr prints the make/model/serial criteria kanshi profiles are keyed
on and lets a mode be tried before it is committed to config. Nothing
else in the Sway package set covers output query or adjustment.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

modules/sway.nix

@@ -43,6 +43,7 @@ in
         playerctl # MPRIS media keys
         sway-launcher-desktop
         pavucontrol
+        wlr-randr # output query/adjustment; prints the criteria kanshi keys on
       ];
     };
     fonts.packages = with pkgs; [