Issue/Description:
Popsicle currently supports writing a single ISO to a USB device, but it does not provide an option to create a multi-bootable USB drive. Tools like Ventoy allow users to store multiple ISOs on a single drive and choose which one to boot from, greatly improving flexibility and usability.

Expected Behavior:
Popsicle should provide an option to create and manage multi-bootable USB drives, allowing users to copy multiple ISOs and select which one to boot from during startup, similar to Ventoy.