Add partition(similar to numpy.partition) #440

Job	Run time
Pass MSRV values to other jobs	3s
clippy/stable	31s
cargo-careful	2m 15s
format/nightly	17s
docs/nightly	22s
nostd/thumbv6m-none-eabi/stable	20s
miri	8m 31s
cross_test/s390x-unknown-linux-gnu/stable	9m 24s
cross_test/i686-unknown-linux-gnu/stable	2m 19s
blas-msrv	43s
tests/beta	3m 29s
tests/stable	3m 10s
tests/nightly	3m 11s
tests/1.64.0	3m 40s
conclusion	3s
	38m 18s

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