Well-known partitionType byte values. Not exhaustive — hundreds of values
are assigned across operating systems — but these cover the partitions most
commonly encountered today.
EMPTY: number
Entry unused.
NTFS_EXFAT: number
NTFS or exFAT.
FAT32_LBA: number
FAT32 with LBA addressing.
LINUX_SWAP: number
Linux swap.
LINUX: number
Linux native filesystem (ext2/3/4, etc).
EFI_PROTECTIVE: number
GPT protective MBR — the whole disk is one entry covering the GPT.