v2: Implement transforms against DataFusion DataFrame, drop custom UDFs #1006

Job	Run time
build-vegafusion-python-osx-64	18m 52s
build-vegafusion-python-linux-64	15m 10s
build-vegafusion-python-osx-arm64	15m 14s
build-vegafusion-python-linux-arm64	16m 19s
build-vegafusion-python-win-64	1m 51s
build-vegafusion-server-linux-64	12m 50s
build-vegafusion-server-linux-arm64	14m 13s
build-vegafusion-server-osx-64	25m 34s
build-vegafusion-server-osx-arm64	13m 19s
build-vegafusion-server-win-64	27m 48s
build-vegafusion-wasm	8m 9s
check-rust	56s
check-vegafusion-python	13m 24s
test-rust (ubuntu-20.04)	24m 49s
test-rust (windows-2022)	42m 20s
test-rust (macos-14)	26m 48s
test-vegafusion-python-win-64	0s
test-vegafusion-python-linux-64	25m 52s
test-vegafusion-python-osx-arm64	1m 12s
	5h 4m 40s

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