refactor to app directory

app/page.tsx

@@ -0,0 +1,13 @@
+export default function Web() {
+  return (
+    <section>
+      <div className="mx-auto grid max-w-screen-xl px-4 py-8 text-center lg:py-16">
+        <div className="mx-auto place-self-center">
+          <h1 className="mb-4 max-w-2xl text-4xl font-extrabold leading-none tracking-tight md:text-5xl xl:text-6xl">
+            IsaCon
+          </h1>
+        </div>
+      </div>
+    </section>
+  )
+}