Move the site launched event listener to the Coming Soon module

This is located in the `src/Listeners/BluehostPlugin.php` file:
```php
// Site Launched - Coming Soon page disabled
add_filter( 'pre_update_option_mm_coming_soon', array( $this, 'site_launch' ), 10, 2 );
```

We need to create a `Listeners/ComingSoon.php` file in the coming soon module and register it as a listener via the `newfold_data_listeners` hook.