generic progress callback implementation on a byte-level #992

Job	Run time
cargo-deny	25s
build_benchmarks	48s
Fuzz targets (cargo-fuzz)	2m 14s
Fuzz targets (afl)	1m 26s
clippy	3m 28s
public_private_dependencies	27s
rustfmt	17s
test_avif	1m 49s
test_avif_decoding	2m 1s
test_big_endian	44s
test_features	28s
test_big_endian (default)	57s
test_toolchains (1.61.0)	4m 49s
test_features (default)	28s
test_big_endian (webp)	49s
verify_msrv	3m 23s
test_toolchains (nightly)	43s
test_big_endian (webp-encoder)	1m 0s
test_toolchains (beta)	45s
test_features (gif)	28s
test_features (jpeg)	29s
test_features (png)	28s
test_features (tiff)	30s
test_features (ico)	24s
test_features (pnm)	29s
test_features (tga)	28s
test_features (webp)	21s
test_features (bmp)	26s
test_features (hdr)	22s
test_features (dxt)	26s
test_features (dds)	21s
test_features (farbfeld)	25s
test_features (openexr)	26s
test_features (jpeg_rayon)	35s
test_features (webp-encoder)	35s
	34m 14s

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