v2: Add lint and type checking for Python package #975

Job	Run time
build-vegafusion-wasm	4m 4s
check-vegafusion-python	1m 5s
build-vegafusion-python-linux-arm64	3m 40s
build-vegafusion-python-osx-64	5m 43s
build-vegafusion-python-osx-arm64	3m 0s
build-vegafusion-python-linux-64	3m 1s
build-vegafusion-python-win-64	7m 18s
build-vegafusion-server-linux-64	2m 37s
build-vegafusion-server-linux-arm64	2m 48s
check-rust	3m 44s
test-rust (ubuntu-20.04)	15m 1s
test-rust (windows-2022)	23m 38s
build-vegafusion-server-osx-64	4m 28s
test-rust (macos-14)	16m 34s
build-vegafusion-server-osx-arm64	3m 7s
build-vegafusion-server-win-64	5m 36s
test-vegafusion-python-linux-64	31m 11s
test-vegafusion-python-osx-arm64	18m 23s
test-vegafusion-python-win-64	1m 44s
	2h 36m 42s

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