research: explore different identity sources and terminology

[AndrewCLu]

Research all different forms of identity data that could be stored in Cryptkeeper and how we can we reconcile them. Ex: Currently we have a notion of "Identities", which are really Semaphore secrets, and Credentials, which are Verifiable Credentials. Can we store both of these as one format? If not, how many different types of "identity data" are there? Is there standard terminology that we can use for different types of data? What is the best way to organize this data for users in an intuitive yet secure manner?