Added simple sidebar

src/app/(admin)/dashboard/list/page.tsx

@@ -0,0 +1,8 @@
+export default function DashboardListPage() {
+    return (
+        <div className="p-6">
+            <h1 className="text-2xl font-bold text-gray-900 mb-4">List</h1>
+            <p className="text-gray-600">This is the list page where you can view all items.</p>
+        </div>
+    )
+}