[Landing] Update headings and descriptions for clarity in README, installation, and quickstart guides to amplify agentic orchestration (WIP) #6719

Job	Run time
compute-version	3s
build-docs / build-docs	1m 29s
build-artifacts / gateway-build	10s
build-artifacts / runner-test (ubuntu-latest)	1m 10s
build-artifacts / runner-test (macos-latest)	1m 1s
build-artifacts / frontend-build	12s
build-artifacts / code-lint	43s
build-artifacts / python-build	26s
build-artifacts / generate-json-schema	17s
build-artifacts / python-test (macos-latest, 3.11)	2m 47s
build-artifacts / python-test (windows-latest, 3.9)	3m 6s
build-artifacts / python-test (ubuntu-latest, 3.9)	9m 18s
build-artifacts / python-test (macos-latest, 3.12)	2m 59s
build-artifacts / python-test (macos-latest, 3.10)	4m 32s
build-artifacts / python-test (macos-latest, 3.13)	2m 52s
build-artifacts / python-test (macos-latest, 3.9)	2m 49s
build-artifacts / python-test (ubuntu-latest, 3.11)	9m 48s
build-artifacts / python-test (windows-latest, 3.11)	2m 19s
build-artifacts / python-test (ubuntu-latest, 3.13)	9m 31s
build-artifacts / python-test (windows-latest, 3.12)	2m 30s
build-artifacts / python-test (ubuntu-latest, 3.10)	10m 4s
build-artifacts / python-test (ubuntu-latest, 3.12)	10m 9s
build-artifacts / python-test (windows-latest, 3.13)	2m 43s
build-artifacts / python-test (windows-latest, 3.10)	2m 6s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	25s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	32s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	15s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	17s
	1h 24m 33s

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