Paths towards resolution on the registry

Hi all - As mentioned on the call on Wednesday, I've aggregated what I believe to be all the options that have been discussed for trying to move forward on the registry topic (which is a blocking topic for entertaining CR).

https://github.com/w3c-fedid/digital-credentials/issues/396

This is meant to be a pre-read for a deeper discussion at TPAC, where I hope we can come to consensus. If I missed an option, please feel free to reach out or add a comment to the issue.

Tim