Feature request: Bulk delete backups with checkboxes

Hello,

Thank you for your great plugin.

I would like to submit a feature request for the Backups page.

When many backups are stored, deleting them one by one takes a lot of time.
It would be very helpful if users could select multiple backups with checkboxes and delete them in bulk.

Suggested improvements:

• checkbox selection for each backup
• bulk delete for selected backups
• select all option
• confirmation dialog before deletion

This would make backup management much easier for users who create backups regularly.

Thank you for considering this request.