feat(27-02): add /setups top-level route page

- Creates src/client/routes/setups/index.tsx
- Renders SetupsView inside standard max-w-7xl page container
- Follows existing createFileRoute pattern from $setupId.tsx sibling

src/client/routes/setups/index.tsx

@@ -0,0 +1,14 @@
+import { createFileRoute } from "@tanstack/react-router";
+import { SetupsView } from "../../components/SetupsView";
+
+export const Route = createFileRoute("/setups/")({
+	component: SetupsPage,
+});
+
+function SetupsPage() {
+	return (
+		<div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-6">
+			<SetupsView />
+		</div>
+	);
+}