Update create flow pages

app/create/page.tsx

@@ -0,0 +1,7 @@
+import { redirect } from "next/navigation";
+import { FIRST_STEP } from "./utils/flowSteps";
+
+/** `/create` redirects to the first wizard step (Figma frame 1). */
+export default function CreateIndexPage() {
+  redirect(`/create/${FIRST_STEP}`);
+}