Introduce an ArrayLike trait #369

Job	Run time
nostd/thumbv6m-none-eabi/stable	10s
cargo-careful	1m 2s
docs/stable	14s
clippy/stable	11s
cross_test/s390x-unknown-linux-gnu/stable	50s
cross_test/i686-unknown-linux-gnu/stable	36s
format/nightly	13s
miri	34s
tests/stable	21s
tests/beta	21s
blas-msrv	44s
tests/nightly	28s
tests/1.64.0	36s
conclusion	1s
	6m 21s

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