[RFE] Add support for persistent overlay

[trigpoint]

When creating a USB stick under withows there is no option to add persistance hence I cannot install additional programmes, or add personal settings, and have them available on the next boot.

Earlier versions had this feature.

[ghost]

personal settings, like setting dark mode in live session is a lifesaver.

old related issue https://github.com/FedoraQt/MediaWriter/issues/41

maybe looking at how https://github.com/pbatard/rufus does it for supported OS, would help for Fedora.

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asd-collab

[MartinBriza]

This is at least partially implemented in @squimrel 's branches but I shamefully never really got around to review and merge it all into master...

[nileshtrivedi]

This feature would be great.

It's 2024 and I can't believe I am unable to set up a bootable linux USB thumbdrive with persistence without already having a Linux or Windows machine around.

• Etcher runs on Mac OS but does not provide persistent volume feature
• Rufus has persistent volume feature but does not run on Mac OS.
• Unetbootin supports persistent volumes and runs on mac OS but has not been updated since 2021 and therefore does not offer modern versions of Linux desktop OS
• Fedora Media Writer runs on Mac OS but does not support persistent volume feature.
• livecd-iso-to-disk supports persistent volume but does not run on mac OS. And the version of livecd-iso-to-disk shipped with Fedora 39 is broken.