add a clickable link to the toast notification

[bussnet]

Show an link action in the toast message (if url exists), to direct open or download a given url direct from the toast message.

Also possible to change the name of the action (default=link) with adding url_name to the Notification toArray() method

    public function toArray($notifiable) {
        return [
            'level' => $this->level,
            'message' => $this->message,
            'url' => $this->url,
            'url_name' => $this->target == '__blank'?'link':'download',
            'target' => $this->target,
        ];
    }