filter placeholder role so it cannot be selected for invites

resources/js/utils/roles.ts

@@ -0,0 +1,7 @@
+import type { Role } from '@/types/jetstream';
+
+export function filterRoles(roles: Role[]) {
+    return roles.filter(function (role) {
+        return role.key !== 'placeholder';
+    });
+}