docs: add multi env tutorial #855

Job	Run time
determine changes	5s
pre-commit	1m 36s
Cargo Machete	59s
build binary \| linux x86_64	1m 23s
build binary \| macos aarch64	1m 23s
build binary \| windows aarch64	6s
build binary \| macos x86_64	0s
cargo test \| ubuntu	1m 27s
build binary \| windows x86_64	1s
cargo test \| macos aarch64	1s
cargo test \| macos x86_64	0s
cargo test \| windows	1s
cargo rustdoc \| ubuntu	1m 6s
cargo fmt \| ubuntu	16s
cargo clippy \| ubuntu	1m 21s
Integration tests \| windows x86_64	1s
Pytest \| windows x86_64	1s
Downstream tests \| windows x86_64	1s
Wheel Tests \| windows x86_64	1s
Wheel Tests \| linux x86_64	1s
Downstream tests \| linux x86_64	1s
Integration tests \| linux x86_64	1s
Pytest \| linux x86_64	1s
Wheel Tests \| macos aarch64	1s
Integration tests \| macos aarch64	1s
Downstream tests \| macos aarch64	1s
Pytest \| macos aarch64	1s
	9m 57s

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