feat: support editable installs for `pixi build` #217

Job	Run time
determine changes	13s
Cargo Machete	1m 2s
pre-commit	28s
build binary \| linux x86_64	1m 22s
build binary \| macos x86_64	0s
build binary \| macos aarch64	31s
build binary \| windows aarch64	1m 9s
build binary \| windows x86_64	1m 7s
cargo test \| ubuntu	1m 10s
cargo test \| macos aarch64	1m 23s
cargo test \| macos x86_64	0s
cargo test \| windows	4m 12s
cargo rustdoc \| ubuntu	38s
cargo fmt \| ubuntu	16s
cargo clippy \| ubuntu	31s
pytest integration \| macos aarch64	0s
test wheel installation \| macos aarch64	0s
test wheel installation \| windows x86_64	0s
pytest integration \| windows x86_64	0s
pytest integration \| linux x86_64	0s
test wheel installation \| linux x86_64	0s
	14m 2s

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