Migrate development environment to Pixi #532

Job	Run time
codegen-clean	1m 39s
rust-fmt-clippy	3m 13s
python-fmt	41s
cargo-bundle-license	1m 27s
vl-convert-python-tests (ubuntu-latest, 3.10, bash -l {0})	10m 1s
vl-convert-rs-tests (ubuntu-latest)	9m 53s
vl-convert-python-tests (windows-2022, 3.10, pwsh)	21m 49s
vl-convert-rs-tests (windows-2022)	10m 28s
vl-convert-python-tests (macos-12, 3.10, bash -l {0})	13m 40s
vl-convert-rs-tests (macos-12)	10m 58s
	1h 23m 49s

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