Add uniffi holder API #6255

Job	Run time
workspace_clippy	5m 35s
aries_vcx_clippy (credx,vdrtools_wallet)	4m 41s
aries_vcx_core_clippy (credx,vdrtools_wallet)	2m 37s
aries_vcx_clippy (vdr_proxy_ledger)	4m 21s
aries_vcx_no_features_clippy	3m 27s
aries_vcx_core_clippy (vdr_proxy_ledger)	4m 14s
verify-code-formatting	21s
workflow-setup	40s
workflow-setup-check	3s
test-unit-workspace	5m 58s
code-coverage-aries-vcx-integration-modular-libs	15m 13s
build-docker-vdrproxy	11s
x86_64-unknown-linux-gnu	10m 29s
test-integration-aries-vcx	15m 13s
x86_64-unknown-linux-musl	9m 59s
test-integration-aries-vcx-mysql	5m 24s
x86_64-apple-darwin	10m 30s
aarch64-apple-darwin	44m 12s
test-integration-did-crate	3m 20s
test-integration-libvcx	3m 6s
test-integration-node-wrapper (18.x)	10m 42s
test-integration-aries-vcx-vdrproxy	13m 14s
publish-docker-vdrproxy	5s
make-release	0s
publish-napi	0s
publish-node-wrapper	0s
publish-agent-core	0s
	2h 53m 35s

Provide feedback