Add uniffi holder API #6404

Job	Run time
workflow-setup	32s
aries_vcx_clippy (credx,vdrtools_wallet)	3m 25s
aries_vcx_clippy (vdr_proxy_ledger)	4m 14s
verify-code-formatting	18s
aries_vcx_core_clippy (credx,vdrtools_wallet)	3m 20s
aries_vcx_core_clippy (vdr_proxy_ledger)	3m 3s
workspace_clippy	5m 21s
workflow-setup-check	1s
test-unit-workspace	3m 56s
build-docker-vdrproxy	6s
code-coverage-aries-vcx-integration-modular-libs	6m 26s
test-integration-aries-vcx	4m 20s
test-integration-aries-vcx-mysql	5m 15s
test-integration-libvcx	3m 1s
test-integration-did-crate	3m 13s
x86_64-unknown-linux-gnu	6m 28s
test-integration-node-wrapper (18.x)	10m 9s
x86_64-unknown-linux-musl	11m 59s
x86_64-apple-darwin	5m 39s
aarch64-apple-darwin	19m 37s
test-integration-aries-vcx-vdrproxy	5m 29s
publish-docker-vdrproxy	5s
make-release	0s
publish-napi	0s
publish-node-wrapper	0s
publish-agent-core	0s
	1h 45m 57s

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