Add 3DGS 4x4 cognitive shader SoA plan #477

Job	Run time
nostd/thumbv6m-none-eabi/stable	25s
clippy/1.95.0	44s
native-backend/stable	8m 26s
Pass MSRV values to other jobs	2s
format/stable	20s
hpc-stream-parallel/rayon	1m 14s
cargo-careful	41s
miri	1m 11s
tier4-avx512-check	27s
docs/nightly	46s
nightly-simd-polyfill	41s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	-1s
blas-msrv	47s
tests/1.95.0	10m 59s
tests/beta	10m 50s
tests/stable	11m 9s
conclusion	0s
	48m 41s

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