feat: Add search functionality for public portal (#5683)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/javascript/portal/portalHelpers.js

@@ -1,8 +1,13 @@
 export const navigateToLocalePage = () => {
   const allLocaleSwitcher = document.querySelector('.locale-switcher');
 
+  if (!allLocaleSwitcher) {
+    return false;
+  }
+
   const { portalSlug } = allLocaleSwitcher.dataset;
   allLocaleSwitcher.addEventListener('change', event => {
     window.location = `/hc/${portalSlug}/${event.target.value}/`;
   });
+  return false;
 };