Refactor to move ChartState to vegafusion core #992

Job	Run time
build-vegafusion-python-linux-64	15m 26s
build-vegafusion-python-linux-arm64	16m 9s
build-vegafusion-python-osx-arm64	12m 48s
build-vegafusion-python-osx-64	20m 11s
build-vegafusion-python-win-64	30m 23s
build-vegafusion-server-linux-64	13m 40s
build-vegafusion-server-linux-arm64	15m 5s
build-vegafusion-server-osx-64	29m 41s
build-vegafusion-server-osx-arm64	11m 37s
build-vegafusion-server-win-64	27m 50s
build-vegafusion-wasm	10m 58s
check-rust	49s
check-vegafusion-python	10m 53s
test-rust (ubuntu-20.04)	28m 20s
test-rust (windows-2022)	48m 30s
test-rust (macos-14)	35m 39s
test-vegafusion-python-osx-arm64	4m 38s
test-vegafusion-python-linux-64	32m 17s
test-vegafusion-python-win-64	10m 29s
	6h 15m 23s

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