Build

docs: add plans/ directory for design and implementation plans #4398

Job	Run time
make static	48s
libnvme (debian, gcc, release)	54s
musl libc build on Alpine	41s
cross (s390x)	46s
build libnvme and nvme-cli separately	48s
muon minimal static	37s
musl libc minimal static build on Debian	28s
windows-msys2-ucrt64	1m 46s
musl libc build on Debian	39s
cross (armhf)	49s
cross (ppc64le)	42s
nvme-cli (fedora, clang, debug)	50s
nvme-cli (debian, gcc, debug)	59s
nvme-cli (tumbleweed, gcc, release)	1m 18s
nvme-cli (debian, clang, debug)	1m 1s
nvme-cli (fedora, gcc, release)	1m 1s
nvme-cli (fedora, gcc, debug)	48s
nvme-cli (fedora, clang, release)	1m 8s
nvme-cli (tumbleweed, gcc, debug)	50s
nvme-cli (debian, gcc, release)	1m 10s
nvme-cli (tumbleweed, clang, debug)	53s
nvme-cli (debian, clang, release)	1m 1s
nvme-cli (tumbleweed, clang, release)	1m 5s
fallback shared libraries	-1s
	21m 1s

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