Ulid support

[lucasteles]

support https://github.com/Cysharp/Ulid

[adrianotr]

Would you be interested in a PR to support this?

ULIDs have the advantage that the most significant bits are compatible with UUID v7.
You can also find implementations for most programming languages.

This is not so true for MassTransitNewId and GuidComb ids.

[lucasteles]

@adrianotr yes, that would be great.