docs: convert reStructuredText sources to MyST markdown #530

Job	Run time
build / lint-rust	1m 56s
build / lint-python	12s
build / generate-license	2m 35s
build / lint-toml	6s
build / check-crates-patch	-1s
build / Linux x86_64 (abi3)	13m 43s
build / Linux x86_64 (3.13t)	13m 42s
build / Linux x86_64 (3.14t)	13m 42s
build / Linux arm64 (3.14t)	11m 59s
build / Linux arm64 (abi3)	12m 11s
build / Linux arm64 (3.13t)	11m 59s
build / Windows x86_64 (3.13t)	13m 46s
build / macOS arm64 (3.14t)	9m 58s
build / macOS arm64 (abi3)	13m 40s
build / Windows x86_64 (abi3)	13m 38s
build / macOS arm64 (3.13t)	6m 53s
build / Windows x86_64 (3.14t)	13m 47s
build / macOS x86_64 (${{ matrix.python-tag }})	0s
build / Source distribution	0s
build / Build docs	1s
build / Merge build artifacts	1s
test	-1s
	2h 33m 47s

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