Function check_disk::filter

pub(crate) fn filter(
    mounts: Vec<Mount>, 
    args: &Args
) -> Result<Vec<MountStat>, Error>

Convert Mounts into MountStats, applying filters from args

This:

• calls statvfs on every filesystem in /proc/mounts
• filters out dummy (0-block) and /proc filesystems
• Only shows one of any given /dev/ filesystem’s mount points (the shortest, same as df)
• Applies the pattern and type filters