Add support to the new VDR key type to the cloud-agent to support creation of the resources

[yshyn-iohk]

Proposed feature

In the scope of the Catalyst Proposal: VDR for the Identus in the Cardano, we need to add support to create a new key type VDR to the DID Registrar API

Feature description

As as user, I want to add the VDR key to my DID using the DID Registrar API

Anything else?

No response