Add mediator coordination messages to aries-vcx messages crate #6489

Job	Run time
workspace_clippy	3m 16s
verify-code-formatting	23s
aries_vcx_core_clippy (credx,vdrtools_wallet)	1m 39s
aries_vcx_clippy (credx,vdrtools_wallet)	2m 21s
aries_vcx_core_clippy (vdr_proxy_ledger)	2m 54s
aries_vcx_clippy (vdr_proxy_ledger)	2m 26s
workflow-setup	25s
code-coverage-aries-vcx-integration-modular-libs	6m 52s
workflow-setup-check	1s
build-docker-vdrproxy	5s
test-unit-workspace	4m 1s
test-integration-aries-vcx	14m 50s
test-integration-aries-vcx-mysql	2m 3s
test-integration-did-crate	2m 48s
test-integration-libvcx	1m 42s
x86_64-unknown-linux-gnu	4m 43s
x86_64-unknown-linux-musl	6m 1s
test-integration-node-wrapper (18.x)	10m 40s
x86_64-apple-darwin	7m 33s
aarch64-apple-darwin	41m 27s
test-integration-aries-vcx-vdrproxy	16m 52s
publish-docker-vdrproxy	11s
make-release	0s
publish-napi	57s
publish-node-wrapper	35s
publish-agent-core	1m 3s
	2h 15m 48s

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