Setup of Grub-btrfs

[shitan198u]

Having distro agnostic support for grub-btrfs would help people from not shooting themselves on the foot.

##Description
Currently not all distros support grub-btrfs out of the box having support for it would be awesome.

Considerations

Yes, a robust script would be required that checks if timeshift or snapper is used by the user if not then what solution the user wants to use. Furthermore, checks if the system is on btrfs and automated creation of a snapshot after grub-btrfs gets installed. Systemd or openrc configurations may will also be required to make it fully distro agnostic.

Checklist

• I checked for duplicate issues.
• I checked already existing discussions.
• This feature is not included in the roadmap.