Improve documentation site layout #521

Job	Run time
build / lint-python	9s
build / lint-toml	8s
build / generate-license	2m 4s
build / lint-rust	22s
build / check-crates-patch	-1s
build / Linux arm64 (abi3)	12m 18s
build / Linux arm64 (3.13t)	12m 13s
build / Linux x86_64 (abi3)	21m 28s
build / Linux arm64 (3.14t)	12m 29s
build / macOS arm64 (3.13t)	2m 14s
build / Windows x86_64 (3.13t)	14m 23s
build / Linux x86_64 (3.13t)	13m 55s
build / Linux x86_64 (3.14t)	14m 24s
build / Windows x86_64 (3.14t)	16m 12s
build / macOS arm64 (abi3)	9m 29s
build / Windows x86_64 (abi3)	14m 2s
build / macOS arm64 (3.14t)	7m 27s
build / macOS x86_64 (${{ matrix.python-tag }})	0s
build / Source distribution	-1s
build / Build docs	4s
build / Merge build artifacts	0s
test	0s
	2h 33m 19s

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