use dynamic billing extension setting in the frontend

resources/js/utils/billing.ts

@@ -1,3 +1,9 @@
+import { usePage } from '@inertiajs/vue3';
+
 export function isBillingActivated() {
-    return true;
+    const page = usePage<{
+        has_billing_extension: boolean;
+    }>();
+
+    return page.props.has_billing_extension;
 }