feat: Add "Not Found" page for HSR, Wuthering Waves, and Zenless

app/[lang]/tof/not-found.tsx

@@ -0,0 +1,33 @@
+"use client";
+
+import Image from "next/image";
+import Link from "next/link";
+
+export default function Error() {
+  return (
+    <div className="relative z-20 overflow-hidden p-6">
+      <Image
+        className="absolute -top-4 left-0 z-10 opacity-20 grayscale md:opacity-40 lg:opacity-50"
+        src="/imgs/stickers/Icon_Emoji_Cry_Animated.webp"
+        width={250}
+        height={400}
+        alt="Nicole"
+        unoptimized
+      />
+      <div className="relative z-20 text-center">
+        <h2 className="mb-6 text-3xl">Page not found</h2>
+        <p className="text-lg">
+          We&apos;re sorry, but the page you are looking for does not exist.
+          <br />
+          <br />
+          <br />
+          <Link href="/hsr">
+            <button className="rounded-2xl border-2 border-black px-4 py-2 font-semibold ring-black transition-all hover:bg-white hover:ring-4">
+              Go Home
+            </button>
+          </Link>
+        </p>
+      </div>
+    </div>
+  );
+}