feat(hpc/audio): Opus CELT primitives — MDCT, band energies, PVQ, Aud… #167

Job	Run time
format/stable	20s
clippy/stable	21s
Pass MSRV values to other jobs	3s
nostd/thumbv6m-none-eabi/stable	28s
cross_test/i686-unknown-linux-gnu/stable	1m 37s
native-backend/stable	38s
cross_test/s390x-unknown-linux-gnu/stable	1m 40s
docs/nightly	-1s
miri	-1s
cargo-careful	-1s
blas-msrv	58s
tests/stable	53s
tests/beta	59s
tests/1.64.0	1m 54s
conclusion	0s
	9m 48s

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