feat(WIP): anoncreds updates

[dbluhm]

This PR is a significant refactor of ACA-Py's handling of Anonymous Credentials, switching to the ledger-agnostic anoncreds-rs library instead of Indy specific libraries we've been using up until this point.

This PR is a work in progress. Given that ACA-Py has been built with Indy-isms and Indy specific libraries since the beginning, there's a lot that needed to be touched in order to move towards a more ledger-agnostic mentality. As of the time of opening this PR, it includes:

• A pluggable interface for defining AnonCreds Method Plugins, enabling resolution or registration of AnonCreds objects on any ledger/network/resolvable location as long as there is a plugin that implements it.
• A new set of Admin API endpoints for creating AnonCreds objects in a ledger-agnostic, plugin-friendly way
• Replaced indy-shared-rs with anoncreds-rs (indy-shared-rs still getting installed but not used)
• Added builtin plugins for:
  • Legacy Indy (Identifiers not using did:indy urls)
    • Supports registering and resolving Schemas and Credential Definitions; revocation objects are WIP
  • did:indy - Currently just stubbed out
  • did:web - Currently just stubbed out
• A simple demo script (to be removed and replaced with proper Integration tests) demoing issuance and verification (without revocation currently) on Legacy Indy.
  • This can be run with docker-compose run tests && docker-compose down -v

We are actively working on:

• Implementing revocation support through the new AnonCreds interface

Things that are very broken right now:

• The old /schemas and /credential-definitions endpoints
• Revocation
• Endorsement

[sonarqubecloud]

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[dbluhm]

Closing in favor of #2276