fix(waybar): guard osConfig hyprland package access

The hyprctl fallback dereferenced osConfig.programs.hyprland.package
unconditionally, which throws on standalone Home Manager (osConfig
defaults to {}) when HM's hyprland package is null. Fall back to
pkgs.hyprland via an or-default, matching the uwsm guard pattern
already used in this file.

Author: khaneliman

modules/home/programs/graphical/bars/waybar/modules/hyprland-modules.nix

@@ -11,7 +11,7 @@ let
     if config.wayland.windowManager.hyprland.package != null then
       config.wayland.windowManager.hyprland.package
     else
-      osConfig.programs.hyprland.package;
+      osConfig.programs.hyprland.package or pkgs.hyprland;
   hyprctl = getExe' hyprlandPackage "hyprctl";
   procps = getExe' pkgs.procps "pidof";
 in