Enable large_dir feature on ext4 partitions

[johnpc]

See https://community.umbrel.com/t/no-space-left-on-device-when-device-has-1tb-available/19947

I am using jellyfin, which offers an intro skipper plugin. The plugin writes many files to ~/umbrel/app-data/jellyfin/config/data/data/introskipper/chromaprints/

For large libraries, it creates more files than are allowed in a single directory on a ext4 partition.

I was able to work around this by enabling large_dir feature:

sudo tune2fs -O large_dir /dev/nvme0n1p4

However, it would have saved a lot of headaches if this feature were enabled when I originally formatted the drive following instructions here: https://github.com/getumbrel/umbrel/wiki/Install-umbrelOS-on-x86-Systems