Add hyprland utilities

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

users/common/options/home-manager/theme/default.nix

@@ -7,6 +7,11 @@ let
     runtimeInputs = with pkgs; [ coreutils-full ];
     bashOptions = [ "nounset" "pipefail" ];
     text = ''
+      if [ -z "$WAYLAND_DISPLAY" ]; then
+        echo "No Wayland session active. Exiting."
+        exit 0
+      fi
+
       [ ! -L "${cfg.configDir}/wallpaper" ] && ln -sf "${cfg.wallpaper}" "${cfg.configDir}/wallpaper"
       [ ! -f "${cfg.configDir}/mode" ] && echo "${cfg.mode}" > "${cfg.configDir}/mode"