Webvh testing + Acapy multitenant holder

[PatStLouis]

This PR adds an "adapter" to test using the WebVH AnonCreds registry.

The adapter contains:

• Agent configurations with the relevant plugins loaded
• Locustfiles with specific setup steps
• A Web-UI interface: this will run the locustfiles using the library mode
• An ACApy multitenant agent as holder: This is to abstract the credo ts agent since no anoncreds registry exists at the moment for that framework

[swcurran]

Given that this README.md is at the root of adapters, and (AFAIK) the adapters concept is new in this PR, I think this has to provide a lot more detail than just — here is the first adapter. What are adapters, how do they interact with the rest of Akrida (they do, right?) and how can I use them.

Likewise, a README.md is needed in the webvh folder that talks about what it does.

You should be able to some AI tool to generate the docs, right? :-)