docs: add pytorch integration guide. #340

Job	Run time
Cargo Machete	59s
pre-commit	38s
determine changes	8s
cargo clippy \| ubuntu	43s
cargo rustdoc \| ubuntu	58s
cargo test \| ubuntu	5m 53s
build binary \| linux x86_64	1m 57s
cargo test \| windows	8m 10s
cargo test \| macos aarch64	8m 21s
cargo fmt \| ubuntu	13s
build binary \| macos aarch64	3m 40s
build binary \| windows aarch64	4m 25s
build binary \| macos x86_64	0s
build binary \| windows x86_64	4m 3s
cargo test \| macos x86_64	0s
pytest integration \| linux x86_64	10m 51s
test wheel installation \| linux x86_64 / Test Installation of Common Wheels \| linux-x86_64	1m 56s
pytest integration \| macos aarch64	9m 32s
test wheel installation \| macos aarch64 / Test Installation of Common Wheels \| macos-aarch64	1m 53s
pytest integration \| windows x86_64	5m 44s
test wheel installation \| windows x86_64 / Test Installation of Common Wheels \| windows-x86_64	3m 18s
	1h 13m 22s

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