Add phase angle calculation functions for complex arrays #593

Job	Run time
Pass MSRV values to other jobs	3s
format/nightly	15s
miri	10m 58s
cross_test/i686-unknown-linux-gnu/stable	2m 14s
nostd/thumbv6m-none-eabi/stable	23s
cargo-careful	1m 45s
docs/nightly	22s
cross_test/s390x-unknown-linux-gnu/stable	2m 27s
clippy/stable	24s
blas-msrv	49s
tests/beta	2m 28s
tests/1.64.0	2m 28s
tests/stable	2m 13s
tests/nightly	2m 28s
conclusion	0s
	29m 17s

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