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>
+
+  )
+}