highlight active side menu item

### Discussed in https://github.com/balajidharma/laravel-vue-admin-panel/discussions/23

<div type='discussions-op-text'>

<sup>Originally posted by **smedero** May 22, 2023</sup>
Hello, how can I highlight the active item of the side menu with a class.
I understand that the template supports it but I can't get it to work.
thank you</div>