add empty page component for about and contact. Updated nav bar links to route to them

src/pages/about.tsx

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+import { type NextPage } from "next/types";
+
+const About: NextPage = () => {
+  
+    return (
+        <div>
+
+        </div>
+    );
+};
+
+export default About

src/pages/contact.tsx

@@ -0,0 +1,12 @@
+import { type NextPage } from "next/types";
+
+const Contact: NextPage = () => {
+  
+    return (
+        <div>
+
+        </div>
+    );
+};
+
+export default Contact