v2-docs: Add embed section, general review and cleanup #1032

Job	Run time
check-vegafusion-python	10m 28s
test-rust (ubuntu-20.04)	14m 1s
test-rust (windows-2022)	39m 23s
build-vegafusion-python-linux-64	2m 58s
build-vegafusion-python-linux-arm64	3m 37s
build-vegafusion-python-osx-64	19m 40s
build-vegafusion-python-osx-arm64	22m 48s
test-rust (macos-14)	14m 22s
build-vegafusion-python-win-64	32m 59s
build-vegafusion-server-linux-64	9m 27s
build-vegafusion-server-win-64	33m 16s
build-vegafusion-wasm	5m 15s
check-rust	3m 53s
build-vegafusion-server-linux-arm64	2m 15s
build-vegafusion-server-osx-64	30m 55s
build-vegafusion-server-osx-arm64	9m 28s
test-vegafusion-python-linux-64	26m 20s
test-vegafusion-python-osx-arm64	59s
test-vegafusion-python-win-64	2m 13s
	4h 44m 17s

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