An MD file which describes the HGVS formats we do and do not suppoort and what we are working on

[Peter-J-Freeman]

Is your feature request related to a problem? Please describe.
It would be really useful to have a web page that tells users what we do and do not support. Also, what is coming soon e.g. some support for uncertain positions and the upcoming release of ENS data and the expanded repeat format.

@leicray this might be a job for you. A markdown table would be nice and could be created directly in GitHub

[leicray]

I can probably do that if you can provide the content.