Impl Serialize/Deserialize for FilterType #1756

Job	Run time
build_benchmarks	43s
Fuzz targets (afl)	2m 1s
Fuzz targets (cargo-fuzz)	53s
cargo-deny	19s
cargo-semver-checks	21s
clippy	2m 5s
public_private_dependencies	25s
rustfmt	4s
test_avif_decoding	1m 19s
test_features	42s
test_toolchains (1.70.0)	27s
test_features (default)	1m 39s
test_other_archs (powerpc-unknown-linux-gnu)	2m 38s
test_toolchains (nightly)	1m 2s
test_features (rayon)	47s
test_other_archs (i686-unknown-linux-gnu)	1m 47s
test_toolchains (beta)	1m 52s
test_features (avif)	55s
test_features (bmp)	42s
test_features (dds)	48s
test_features (exr)	56s
test_features (ff)	49s
test_features (gif)	52s
test_features (hdr)	29s
test_features (ico)	42s
test_features (jpeg)	29s
test_features (png)	31s
test_features (pnm)	37s
test_features (qoi)	41s
test_features (tga)	27s
test_features (tiff)	49s
test_features (webp)	48s
	29m 39s

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