Add uniffi holder API #6253

Job	Run time
workspace_clippy	6m 17s
verify-code-formatting	24s
aries_vcx_core_clippy (credx,vdrtools_wallet)	3m 41s
aries_vcx_clippy (credx,vdrtools_wallet)	4m 31s
aries_vcx_core_clippy (vdr_proxy_ledger)	3m 38s
aries_vcx_no_features_clippy	2m 20s
workflow-setup	34s
aries_vcx_clippy (vdr_proxy_ledger)	4m 20s
workflow-setup-check	5s
code-coverage-aries-vcx-integration-modular-libs	18m 58s
test-integration-aries-vcx	16m 50s
test-unit-workspace	5m 49s
build-docker-vdrproxy	8s
test-integration-aries-vcx-mysql	4m 15s
x86_64-unknown-linux-gnu	11m 43s
x86_64-unknown-linux-musl	8m 39s
test-integration-did-crate	7m 15s
x86_64-apple-darwin	16m 13s
test-integration-libvcx	3m 32s
aarch64-apple-darwin	33m 47s
test-integration-node-wrapper (18.x)	12m 54s
test-integration-aries-vcx-vdrproxy	13m 11s
publish-docker-vdrproxy	2s
make-release	0s
publish-napi	0s
publish-node-wrapper	0s
publish-agent-core	0s
	2h 59m 6s

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