Slim down quick start page #5820

Job	Run time
build-and-check	2m 48s
test-integration-packages/internal	1m 7s
test-integration-packages/billing	58s
test-integration-common	46s
test-integration-sdk	1m 19s
test-integration-cli	40s
test-integration-web	43s
test-packages/billing	44s
test-packages/internal	1m 1s
test-.agents	1m 21s
test-web	1m 29s
test-cli	50s
test-packages/agent-runtime	44s
test-sdk	59s
test-integration-packages/agent-runtime	41s
test-common	40s
	16m 50s

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