Implement ULID creation and decoding

[jaromil]

ULIDs are a base32 encoded variant of UUIDs (incompatible with them) which can be lexicographically sorted based on time of creation. The best C implementation I've found is this https://github.com/skeeto/ulid-c

It can be useful to have them in Zenroom and it will mean to also implement base32 encoding/decoding.

[matteo-cristino]

What about also having a statement to create uuid? The simpler are uuid v4 that are completely random, but there can be intereset also in other uuid versions

[jaromil]

done

When I create a random ulid