Add frontend template with dummy data

frontend/app/manage/page.tsx

@@ -0,0 +1,25 @@
+export default function Home() {
+    return (
+      <div className="flex min-h-screen flex-col items-center py-2">
+        <h1 className="text-3xl font-bold mt-16">halflink</h1>
+        <p>Shorten a link with ease.</p>
+  
+        <h2 className="text-2xl font-bold mt-8">Manage your link</h2>
+
+        <form className="mt-4 flex w-full max-w-md">
+          <input
+            type="text"
+            placeholder="Enter your long URL here"
+            className="flex-grow border border-gray-300 rounded-l px-4 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
+          />
+          <button
+            type="submit"
+            className="bg-blue-500 text-white px-4 py-2 rounded-r hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-blue-500"
+          >
+            Shorten
+          </button>
+        </form>
+      </div>
+    );
+  }
+