Add traits and types to capture dimensionality #586

Job	Run time
clippy/stable	24s
Pass MSRV values to other jobs	3s
format/nightly	12s
miri	10m 47s
cross_test/i686-unknown-linux-gnu/stable	2m 0s
cross_test/s390x-unknown-linux-gnu/stable	9m 26s
nostd/thumbv6m-none-eabi/stable	16s
cargo-careful	1m 42s
docs/nightly	21s
blas-msrv	46s
tests/stable	2m 41s
tests/1.64.0	3m 29s
tests/nightly	2m 44s
tests/beta	2m 32s
conclusion	2s
	37m 25s

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