Gaussian blur #1742

Job	Run time
cargo-deny	17s
Fuzz targets (afl)	2m 11s
build_benchmarks	44s
Fuzz targets (cargo-fuzz)	52s
clippy	2m 5s
cargo-semver-checks	29s
public_private_dependencies	24s
rustfmt	10s
test_avif_decoding	1m 18s
test_other_archs (powerpc-unknown-linux-gnu)	2m 24s
test_features	18s
test_other_archs (i686-unknown-linux-gnu)	1m 22s
test_toolchains (1.70.0)	28s
test_features (default)	1m 43s
test_toolchains (nightly)	1m 4s
test_features (rayon)	21s
test_toolchains (beta)	1m 22s
test_features (avif)	1m 6s
test_features (bmp)	25s
test_features (dds)	26s
test_features (exr)	34s
test_features (ff)	18s
test_features (gif)	20s
test_features (hdr)	28s
test_features (ico)	27s
test_features (jpeg)	20s
test_features (png)	27s
test_features (pnm)	20s
test_features (qoi)	17s
test_features (tga)	19s
test_features (tiff)	30s
test_features (webp)	28s
	24m 17s

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