adds hero page

frontend/src/Hero.tsx

@@ -0,0 +1,21 @@
+export default function Hero({ className = '' }: { className?: string }) {
+  return (
+    <div className={`flex flex-col ${className}`}>
+      <p className="mb-10 text-center text-4xl font-semibold">
+        DocsGPT <span className="text-3xl">🦖</span>
+      </p>
+      <p className="mb-3 text-center">
+        Welcome to DocsGPT, your technical documentation assistant!
+      </p>
+      <p className="mb-3 text-center">
+        Enter a query related to the information in the documentation you
+        selected to receive and we will provide you with the most relevant
+        answers.
+      </p>
+      <p className="text-center">
+        Start by entering your query in the input field below and we will do the
+        rest!
+      </p>
+    </div>
+  );
+}