MD5 digests in Gren.

import MD5

MD5.digest "hello"
-- "5d41402abc4b2a76b9719d911017c592"

MD5.digest "€ ♝ ♧ ☐"
-- "2adb08ac813a93665950fe9203faca10"

Mostly ported from elm-md5, with some help from elm-utf-tools and claude.