feat : add front-end using shad cn

frontend/src/components/layout/DashboardLayout.tsx

@@ -0,0 +1,20 @@
+import Sidebar from "./Sidebar"
+
+export default function DashboardLayout({children}:{children:React.ReactNode}){
+
+  return(
+
+    <div className="flex">
+
+      <Sidebar/>
+
+      <div className="flex-1 p-6 bg-slate-50 min-h-screen">
+
+        {children}
+
+      </div>
+
+    </div>
+
+  )
+}

frontend/src/components/layout/Sidebar.tsx

@@ -0,0 +1,17 @@
+import {Link} from "react-router-dom";
+
+export default function Sidebar() {
+	return (
+		<div className="w-[220px] h-screen border-r bg-white p-4">
+			<h2 className="text-lg font-semibold mb-6">Admin</h2>
+
+			<div className="space-y-3">
+				<Link to="/dashboard">Dashboard</Link>
+
+				<Link to="/blog">Blog</Link>
+
+				<Link to="/department">Department</Link>
+			</div>
+		</div>
+	);
+}