Migrate the landing page to React (keep docs & blog on MkDocs) #7303

Job	Run time
build-docs / build-docs	1m 48s
compute-version	2s
build-artifacts / runner-test	1m 2s
build-artifacts / frontend-build	10s
build-artifacts / code-lint	40s
build-artifacts / gateway-build	17s
build-artifacts / generate-json-schema	22s
build-artifacts / python-build	20s
build-artifacts / python-test (ubuntu-latest, 3.10)	5m 59s
build-artifacts / python-test (macos-latest, 3.12)	2m 35s
build-artifacts / python-test (windows-latest, 3.12)	2m 35s
build-artifacts / python-test (windows-latest, 3.10)	2m 8s
build-artifacts / python-test (macos-latest, 3.13)	3m 11s
build-artifacts / python-test (ubuntu-latest, 3.12)	5m 32s
build-artifacts / python-test (macos-latest, 3.10)	2m 11s
build-artifacts / python-test (ubuntu-latest, 3.11)	5m 16s
build-artifacts / python-test (macos-latest, 3.11)	4m 2s
build-artifacts / python-test (ubuntu-latest, 3.13)	5m 26s
build-artifacts / python-test (windows-latest, 3.13)	2m 9s
build-artifacts / python-test (windows-latest, 3.11)	2m 18s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	22s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	28s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	24s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	20s
	49m 37s

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