Add `zarrs_validate` #145

Job	Run time
clippy	53s
fmt	32s
test	1m 55s
build (stable, --features "")	1m 30s
build (stable, --all-features)	3m 4s
build (stable, --no-default-features)	1m 38s
build (1.80, --features "")	1m 42s
build (1.80, --all-features)	3m 4s
build (1.80, --no-default-features)	1m 46s
build (beta, --features "")	1m 50s
build (beta, --all-features)	2m 58s
build (beta, --no-default-features)	1m 43s
build (nightly, --features "")	1m 25s
build (nightly, --all-features)	2m 36s
build (nightly, --no-default-features)	1m 23s
	27m 59s

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