feat(ssi): resolve dids

• Added a new event which takes a did and resolves it.
  • An error is thrown if there is an issue while resolving the DID. (for example, method not supported)
• Supported methods for resolution are:
  • key, jwk, indy, sov, web and peer
• Supported methods for registration are:
  • peer, key, jwk (indy also, but via a custom API)

dependent upon !10 (merged), !9 (merged) and !8 (merged)