chore: add installation instructions (#1314) #7868

Job	Run time
clippy	3m 25s
verify-code-formatting	23s
workflow-setup	27s
build-docker-aath-backchannel	17s
test-integration-aries-vcx (askar_wallet,anoncreds)	5m 51s
test-integration-aries-vcx-ledger	1m 26s
build-docker-vdrproxy	5s
test-integration-did-crate	2m 5s
test-unit-workspace	1m 47s
workflow-setup-check	1s
test-integration-aries-vcx-vdrproxy	11m 43s
publish-docker-vdrproxy	6s
publish-docker-aath-backchannel	0s
make-release	0s
	27m 36s

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