Add OpenID4VP client #933

Job	Run time
lint	19s
docker-build	42s
build (linux, amd64)	22s
test	6m 2s
build (linux, 386)	18s
build (linux, arm)	17s
build (linux, arm64)	23s
build (darwin, amd64)	16s
build (darwin, arm64)	17s
build (windows, amd64)	18s
build (windows, 386)	19s
build (windows, arm)	19s
build (windows, arm64)	17s
integration-test-serverside (f0023141ec429d912e329665f937d05b178a3fee)	1m 34s
integration-test-clientside (v0.13.2)	1m 33s
analyze	1m 49s
	15m 5s

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