Migrate the landing page to React (keep docs & blog on MkDocs) #7302

Job	Run time
compute-version	4s
build-docs / build-docs	1m 39s
build-artifacts / code-lint	45s
build-artifacts / gateway-build	12s
build-artifacts / runner-test	1m 2s
build-artifacts / frontend-build	10s
build-artifacts / python-build	21s
build-artifacts / generate-json-schema	19s
build-artifacts / python-test (macos-latest, 3.10)	3m 17s
build-artifacts / python-test (windows-latest, 3.12)	2m 9s
build-artifacts / python-test (windows-latest, 3.11)	2m 11s
build-artifacts / python-test (macos-latest, 3.12)	2m 37s
build-artifacts / python-test (macos-latest, 3.11)	4m 27s
build-artifacts / python-test (macos-latest, 3.13)	2m 42s
build-artifacts / python-test (windows-latest, 3.13)	2m 14s
build-artifacts / python-test (ubuntu-latest, 3.11)	5m 36s
build-artifacts / python-test (ubuntu-latest, 3.12)	6m 5s
build-artifacts / python-test (windows-latest, 3.10)	2m 13s
build-artifacts / python-test (ubuntu-latest, 3.13)	5m 16s
build-artifacts / python-test (ubuntu-latest, 3.10)	5m 54s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	27s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	27s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	16s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	18s
	50m 41s

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