feat: Adds async and defer attributes to chatwoot script tag (#2890)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Nithin David Thomas <1277421+nithindavid@users.noreply.github.com>

app/views/layouts/vueapp.html.erb

@@ -66,6 +66,8 @@
         var BASE_URL="";
         var g=d.createElement(t),s=d.getElementsByTagName(t)[0];
         g.src=BASE_URL+"/packs/js/sdk.js";
+        g.defer = true;
+        g.async = true;
         s.parentNode.insertBefore(g,s);
         s.async=!0;
         g.onload=function(){