Support rendering of compound linked credentials

[dmitrizagidulin]

There's several examples of complex compound credentials (LER-RS resumes, CLRv2, etc) that embed many VCs in an "outer" container credential. Example of an app that produces a compound LER-RS credential: https://resume.allskillscount.org/

BUT, a complementary, and possibly preferable, approach (brought up by @paulfdietrich and the DB folks) is to model compound credential as an outer container credential with LINKS (secured by digest hash) to other VCs in a presentation.

This issue is -- how to indicate that a renderMethod template is intended to include these linked credentials? So, for example, if you have an LER-RS credential, which includes 3 VCs (linked to them, with digest hash), do we need any special affordances in the renderMethod section that says "also include those linked VCs when rendering this template?"

[msporny]

Hey @dmitrizagidulin and @paulfdietrich we'd like to explore this a bit more before handing over to VCWG as this feels like it would benefit from some discussion around use cases (and could potentially be a lot of work). We need to figure out the scope of this work before proceeding.

Can either of you join us on a call to discuss? Or provide feedback via the issue.

[dmitrizagidulin]

@msporny absolutely, I'd love to join a call on this. @paulfdietrich?