[Landing] Update headings and descriptions for clarity in README, installation, and quickstart guides to amplify agentic orchestration (WIP) #6727

Job	Run time
compute-version	2s
build-docs / build-docs	1m 17s
build-artifacts / code-lint	44s
build-artifacts / gateway-build	10s
build-artifacts / runner-test (ubuntu-latest)	1m 3s
build-artifacts / runner-test (macos-latest)	54s
build-artifacts / frontend-build	8s
build-artifacts / generate-json-schema	24s
build-artifacts / python-build	27s
build-artifacts / python-test (macos-latest, 3.10)	2m 44s
build-artifacts / python-test (macos-latest, 3.12)	2m 46s
build-artifacts / python-test (macos-latest, 3.9)	2m 53s
build-artifacts / python-test (macos-latest, 3.11)	2m 41s
build-artifacts / python-test (windows-latest, 3.13)	2m 19s
build-artifacts / python-test (windows-latest, 3.11)	2m 36s
build-artifacts / python-test (windows-latest, 3.10)	2m 10s
build-artifacts / python-test (macos-latest, 3.13)	3m 55s
build-artifacts / python-test (ubuntu-latest, 3.10)	10m 20s
build-artifacts / python-test (ubuntu-latest, 3.11)	9m 52s
build-artifacts / python-test (ubuntu-latest, 3.9)	10m 3s
build-artifacts / python-test (ubuntu-latest, 3.13)	10m 16s
build-artifacts / python-test (ubuntu-latest, 3.12)	10m 4s
build-artifacts / python-test (windows-latest, 3.9)	3m 1s
build-artifacts / python-test (windows-latest, 3.12)	2m 21s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	32s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	33s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	21s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	25s
	1h 25m 1s

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