feat(admin): added dashboard comp.

src/pages/admins/layout/MainLayout.tsx

@@ -0,0 +1,15 @@
+import { Outlet } from "react-router-dom";
+import Navbar from "@/components/Navbar";
+import Footer from "@/components/Footer";
+
+const MainLayout = () => {
+  return (
+    <>
+      <Navbar />
+      <Outlet />
+      <Footer />
+    </>
+  );
+};
+
+export default MainLayout;