Move match_type from enum to entity format

[matentzn]

Previously, the match_type element was a controlled vocabulary managed as a relatively static enum in LinkML. Given the many ways in which we may want to extend match_types, we now think it is better to define an external vocabulary for this.

This issue serves as a warning to that end: when the proposal is approved by the core team, elements like HumanCurated, Lexical etc will have to be prefixed like:

sssom:HumanCurated, sssom:Lexical.

[matentzn]

This has been done in #164

[saubin78]

Hi! will this be available in the 1.0 version of SSSOM?
When do you expect to publish the 1.0 version?

[matentzn]

It will be! It is already on the master branch.. I think you can expect this to be in SSSOM 1.0 as is.