Use ChartState in vegafusion-wasm #996

Job	Run time
build-vegafusion-python-osx-arm64	12m 53s
build-vegafusion-python-linux-64	15m 31s
build-vegafusion-python-osx-64	18m 16s
build-vegafusion-python-linux-arm64	16m 55s
build-vegafusion-python-win-64	33m 41s
build-vegafusion-server-linux-64	13m 24s
build-vegafusion-server-linux-arm64	14m 34s
build-vegafusion-server-osx-64	25m 23s
build-vegafusion-server-osx-arm64	13m 37s
build-vegafusion-server-win-64	29m 1s
build-vegafusion-wasm	11m 5s
check-rust	7m 45s
check-vegafusion-python	11m 1s
test-rust (ubuntu-20.04)	28m 38s
test-rust (windows-2022)	48m 41s
test-rust (macos-14)	26m 1s
test-vegafusion-python-osx-arm64	4m 37s
test-vegafusion-python-linux-64	30m 50s
test-vegafusion-python-win-64	10m 37s
	6h 12m 30s

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