Expand suite of DID Resolvers

[gmulhearn]

This is a parent issue to discuss and note DID Resolver support efforts.

Our did_core crate is structured in a way to support new implementations for did method resolvers. Currently (18/9/24) we support resolvers for did:peer, did:sov & did:web, but we are looking to grow, allowing our rust consumers and other parts of the vcx codebase (e.g. aries protocol) to utilize a wider range of methods.

For all implementations, a crate should be created for that method, and DidResolvable should be implemented (see did:peer, did:sov & did:web) for examples.

To be developed

• did:key Implement Resolver for did:key DidResolvable #1287 (we already have a crate for creating and managing did:keys, just need an explicit resolver, should be trivial)
• did:jwk Implement Resolver for did:jwk DidResolvable #1290
• did:indy Implement Resolver for did:indy DidResolvable #1291
• external universal Implement proxy Resolver for universal resolver DidResolvable #1292
• did:ethr Implement did:ethr resolver #1066

Under Investigation

• did:cheqd
• did:tdw
• did:plc