docs(usage): Add documentation about response channel usage (#1747) #3508

Job	Run time
upgradeability-test / test-prepare	3s
deployment-test / test-prepare	2s
verify / api-tests	3m 17s
verify / integration-tests	2m 55s
verify / end-to-end-tests (edc-tests/edc-controlplane/catalog-tests)	3m 9s
verify / postgres-tests	8m 45s
verify / end-to-end-tests (edc-tests/edc-controlplane/edr-api-tests)	2m 48s
verify / end-to-end-tests (edc-tests/edc-controlplane/iatp-tests)	6m 0s
verify / unit-tests	2m 35s
verify / end-to-end-tests (edc-tests/edc-controlplane/policy-tests)	3m 5s
verify / verify-formatting	2m 7s
verify / end-to-end-tests (edc-tests/edc-controlplane/transfer-tests)	4m 24s
verify / end-to-end-tests (edc-tests/edc-controlplane/agreement-retirement-tests)	2m 0s
verify / verify-helm-docs	3s
verify / end-to-end-tests (edc-tests/edc-dataplane/edc-dataplane-tokenrefresh-tests)	2m 40s
verify / verify-javadoc	1m 55s
verify / end-to-end-tests (edc-tests/edc-dataplane/cloud-transfer-tests)	3m 16s
verify / end-to-end-tests (edc-tests/edc-end2end)	3m 58s
deployment-test / test-hashicorp-postgres (v1.31.0)	8m 37s
deployment-test / test-hashicorp-postgres (v1.30.4)	11m 30s
deployment-test / test-in-memory	2m 55s
deployment-test / test-hashicorp-postgres (v1.29.8)	9m 14s
upgradeability-test / test-upgradeability	6m 3s
summary	1s
	1h 31m 22s

Provide feedback