feat: display version number in header

src/components/header.tsx

@@ -1,4 +1,5 @@
 import { Html } from "@kitajs/html";
+import { version } from "../../package.json";
 
 export const Header = ({
   loggedIn,
@@ -85,6 +86,9 @@ export const Header = ({
               <a href={`${webroot}/`}>ConvertX</a>
             </strong>
           </li>
+          <li>
+            <a href="#" safe>{`v${version}`}</a>
+          </li>
         </ul>
         {rightNav}
       </nav>