Add dockerised setup for iGrant.io Consent BB solution

Import Userrequested to merge
github/fork/decentralised-dataexchange/main into main

Description

This PR contains the setup for test environment of iGrant.io Consent Building Block solution.

Related Issue

As discussed in Consent BB WG weekly call on 2023-12-01 and mentioned here.

Motivation and Context

As an initial setup towards running test harness against solution.

Merge request reports