Unicode compress

[artimonist]

buffer --> base58 -->
if neighbors chars in 0..9,a..f, use as hex, translate to a unicode char.
use longest neighbors chars to translat.
length at least 2 chars.

example: afcghyZAamnfds --> \u{afc}ghyZAamn\u{fd}s

[artimonist]

Not compress for storage, compress for memorize.