docs: update quick start #5115

Job	Run time
build-and-check	2m 31s
test-cli	1m 5s
test-integration-packages/agent-runtime	40s
test-sdk	48s
test-integration-cli	40s
test-integration-common	45s
test-integration-sdk	59s
test-integration-backend	45s
test-packages/internal	48s
test-common	38s
test-integration-.agents	1m 9s
test-packages/billing	41s
test-packages/agent-runtime	49s
test-npm-app	38s
test-integration-web	37s
test-integration-packages/internal	38s
test-backend	38s
test-.agents	1m 8s
test-integration-npm-app	36s
test-web	40s
test-integration-packages/billing	1m 10s
	18m 23s

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