Add Vercel Web Analytics (static script tag)

Co-authored-by: Claude <noreply@anthropic.com>

Author: ivanbanov

src/index.html

@@ -62,6 +62,8 @@
       </nav>
     </main>
     <script src="./scripts.js"></script>
+    <!-- Vercel Web Analytics (static site: script tag, no npm package) -->
+    <script defer src="/_vercel/insights/script.js"></script>
   </body>
 
 </html>