Implement support of the Presentation Exchange 2.0 protocol in the cloud-agent

### Problem
Identus Platform doesn't support the Presentation Exchange 2.0

### Proposed feature

Presentation Exchange 2.0 is one of the widely used protocols on top of the Present Proof protocol.
It's essential to implement it in the cloud agent to support the well-known protocol between the peers.

### Feature description

Required flows:
| Holder | Verifier|
| --- | --- |
| cloud-agent | cloud-agent |
| cloud-agent | SDK-TS |
| cloud-agent | SDK-Swift |
| cloud-agent | SDK-KMP |

| Verifier | Holder|
| --- | --- |
| cloud-agent | cloud-agent |
| cloud-agent | SDK-TS |
| cloud-agent | SDK-Swift |
| cloud-agent | SDK-KMP |

Specification reference: https://identity.foundation/presentation-exchange/spec/v2.0.0/

### Anything else?

n/a