DID Alias Map

[bumblefudge]

I'm leaning towards a local array of arbitrary, user-defined strings with DIDs as keys as an object in local memory
1.) portability/sync between different credible form factors may be required later so we may need to pick a type of object/array that works across contexts.
2.) eventually we might need to align this with:
https://identity.foundation/faq/#what-exactly-is-a-connection-is-it-a-transport-is-it-ephemeral
and/or
https://w3c-ccg.github.io/universal-wallet-interop-spec/#connection
passive interop might be fine-- if our data model connection doesn't align perfectly with the Aries one, it's fine, as long as it's relatively feasible to translate between the two on im/export.