feat(nixos): add pikachu homepage guest

configs/nixos/guests/actualbudget.nix

@@ -25,6 +25,14 @@ in
       }
     ];
 
+    registry.homepage.${config.networking.hostName}.actualbudget = {
+      tab = "Apps";
+      section = "Other";
+      name = "Actual Budget";
+      description = "Finance";
+      icon = "actual-budget.png";
+    };
+
     guests.actualbudget = {
       interior = {
         modules.services.actualbudget = {