docs: expand cargo-first vendoring playbook #93

Job	Run time
build (x86_64-apple-darwin, macos-latest)	2m 47s
build (aarch64-apple-darwin, macos-latest)	2m 36s
build-linux-host-simd	9m 25s
build (x86_64-unknown-linux-gnu, ubuntu-latest)	2m 20s
build (aarch64-unknown-linux-gnu, ubuntu-latest)	4m 9s
release	8s
	21m 25s

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