refactor(waybar): register owned modules

configs/nixos/modules/desktop/apps/vencord.nix

@@ -2,6 +2,7 @@
   config,
   lib,
   pkgs,
+  util,
   ...
 }:
 # Vesktop, a Discord client with Vencord built in.
@@ -17,7 +18,7 @@ in
 
     registry.window-icon.${config.networking.hostName}.vesktop = {
       class = "[Vv]esktop";
-      icon = "f1ff";
+      icon = util.glyph "f1ff";
     };
   };
 }