build

doc: add nvme list namespace usage sizes description #3097

Job	Run time
cross (armhf)	46s
cross (ppc64le)	45s
default (gcc, debug)	26s
default (clang, debug)	30s
cross (s390x)	41s
default (clang, release)	33s
make static	37s
build libnvme and nvme-cli separately	40s
default (gcc, release)	37s
fallback shared libraries	0s
muon minimal static	38s
	6m 13s

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