Support for mount options

[Amplificator]

Hi.

After giving the manjaro-architect installer a go and comparing features, one of the notable differences (to me) was the option for mount options right in the installer which is pretty neat. That way you can set btrfs compression immediately or whatever else you fancy.

I imagine something like a simple list with simple options like being able to choose either "discard" or "nodiscard" and perhaps a short description of it, just like the ones XFS provides: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/filesystems/xfs.txt?id=HEAD

I guess you can add the same argument for things like IO schedulers as well which would be nice to have in the installer.