feat: add laravel backup

[gvieira18]

This pull request introduces a comprehensive backup and cleanup system using the Spatie Laravel Backup package, including a custom cleanup strategy, new configuration, and scheduled backup tasks. It also updates several dependencies and adds SFTP support for file storage.

Backup System Integration and Scheduling:

• Added a new config/backup.php configuration file to enable and customize the Spatie Laravel Backup package, including backup sources, destinations, notifications (mail, Slack, Discord), health checks, and cleanup strategies. A custom SimpleStrategy is introduced for backup cleanup, allowing flexible retention of old backups.
• Implemented a custom cleanup strategy in SimpleStrategy under app/Tasks/Cleanup/Strategies/SimpleStrategy.php, providing logic to retain a configurable number of old backups.
• Updated routes/console.php to schedule backup, cleanup, and monitoring commands using Laravel's scheduler, with conditional execution based on configuration. The Cloudflare reload schedule is also adjusted.

Storage and Dependency Enhancements:

• Added SFTP disk configuration to config/filesystems.php, enabling backups to be stored on remote servers via SFTP with environment-based credentials.
• Updated composer.json to require spatie/laravel-backup, add SFTP support via league/flysystem-sftp-v3, and bump several package versions for improved compatibility and features.
• Upgraded several frontend dependencies in package.json for better stability and latest features.