[Docs] Minor edits on the landing page, in README, and Quickstart (#3… #5529

Job	Run time
build-docs / build-docs	1m 39s
compute-version	3s
build-artifacts / code-lint	44s
build-artifacts / frontend-build	9s
build-artifacts / gateway-build	10s
build-artifacts / runner-test (macos-latest)	1m 34s
build-artifacts / runner-test (ubuntu-latest)	56s
build-artifacts / python-build	23s
build-artifacts / generate-json-schema	16s
build-artifacts / python-test (macos-latest, 3.10)	3m 21s
build-artifacts / python-test (ubuntu-latest, 3.13)	3m 57s
build-artifacts / python-test (macos-latest, 3.9)	3m 3s
build-artifacts / python-test (windows-latest, 3.9)	1m 40s
build-artifacts / python-test (ubuntu-latest, 3.11)	3m 54s
build-artifacts / python-test (windows-latest, 3.10)	2m 59s
build-artifacts / python-test (windows-latest, 3.12)	2m 7s
build-artifacts / python-test (windows-latest, 3.13)	2m 21s
build-artifacts / python-test (macos-latest, 3.12)	2m 16s
build-artifacts / python-test (ubuntu-latest, 3.9)	4m 4s
build-artifacts / python-test (windows-latest, 3.11)	2m 53s
build-artifacts / python-test (macos-latest, 3.11)	2m 39s
build-artifacts / python-test (macos-latest, 3.13)	2m 57s
build-artifacts / python-test (ubuntu-latest, 3.12)	3m 53s
build-artifacts / python-test (ubuntu-latest, 3.10)	3m 54s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	38s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	29s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	17s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	22s
	53m 38s

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