feat(hpc): l1/l2/linf SIMD kernels + stability docs (Sprint 0) #332

Job	Run time
native-backend/stable	7m 56s
format/stable	19s
clippy/1.95.0	42s
hpc-stream-parallel/rayon	1m 27s
nostd/thumbv6m-none-eabi/stable	26s
Pass MSRV values to other jobs	2s
docs/nightly	0s
cargo-careful	0s
miri	0s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
blas-msrv	52s
tests/beta	11m 9s
tests/1.95.0	10m 41s
tests/stable	11m 15s
conclusion	0s
	44m 49s

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