Add an explainer

[mprorock]

obviously we will build on this and make it better

[mprorock]

@selfissued we are charted explicity for core data model - I am fine to expand the explainer later and have noted the valid concern raised here in #99 - can we get this approved and merged as is to be able to start horizontal review with tag per issue #97 ?

we cannot do this until explainer is merged.

[OR13]

Multiple approvals, changes requested and implemented, merging.

[TallTed]

[@selfissued] At some point, I believe we need to describe how VC-JWT payloads can use native JWT claims and need not use JSON-LD.

I suggest you create an Issue and/or PR for this.

[andresuribe87]

[@selfissued] At some point, I believe we need to describe how VC-JWT payloads can use native JWT claims and need not use JSON-LD.

I suggest you create an Issue and/or PR for this.

Perhaps we can use #98 to track