Add mediator and simple client implementation #6242

Job	Run time
aries_vcx_clippy (credx,vdrtools_wallet)	3m 27s
verify-code-formatting	20s
aries_vcx_no_features_clippy	2m 20s
aries_vcx_clippy (vdr_proxy_ledger)	4m 48s
aries_vcx_core_clippy (credx,vdrtools_wallet)	2m 57s
aries_vcx_core_clippy (vdr_proxy_ledger)	3m 10s
workflow-setup	31s
workspace_clippy	5m 0s
code-coverage-aries-vcx-integration-modular-libs	15m 57s
build-docker-vdrproxy	10s
test-unit-workspace	3m 5s
workflow-setup-check	3s
test-integration-aries-vcx	16m 47s
test-integration-aries-vcx-mysql	3m 44s
test-integration-libvcx	2m 56s
test-integration-did-crate	3m 0s
test-integration-node-wrapper (18.x)	10m 12s
x86_64-unknown-linux-gnu	10m 26s
x86_64-unknown-linux-musl	10m 4s
x86_64-apple-darwin	13m 46s
aarch64-apple-darwin	48m 3s
test-integration-aries-vcx-vdrproxy	15m 24s
publish-docker-vdrproxy	10s
make-release	0s
publish-napi	1m 5s
publish-node-wrapper	33s
publish-agent-core	49s
	2h 58m 47s

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