updated navbar

Author: Richajaishwal0

src/components/CustomSidebar.module.css

@@ -0,0 +1,7 @@
+import React from "react";
+import OriginalNavbarItem from "@theme-original/NavbarItem";
+
+// This wrapper ensures a valid default export for NavbarItem
+export default function NavbarItem(props: any) {
+  return <OriginalNavbarItem {...props} />;
+}