docs(simd): dispatch architecture + parity matrix + tech debt + integration plan #368

Job	Run time
format/stable	20s
nostd/thumbv6m-none-eabi/stable	27s
Pass MSRV values to other jobs	2s
hpc-stream-parallel/rayon	1m 17s
clippy/1.95.0	39s
native-backend/stable	7m 43s
docs/nightly	0s
miri	0s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
cargo-careful	0s
tests/beta	10m 55s
blas-msrv	1m 57s
tests/1.95.0	9m 15s
tests/stable	11m 59s
conclusion	-1s
	44m 33s

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