feat: segmented fetch with backoff retry in HttpRangeReader #82

Job	Run time
format/stable	23s
native-backend/stable	34s
cross_test/i686-unknown-linux-gnu/stable	1m 35s
nostd/thumbv6m-none-eabi/stable	24s
cross_test/s390x-unknown-linux-gnu/stable	1m 32s
Pass MSRV values to other jobs	4s
clippy/stable	24s
miri	0s
docs/nightly	0s
cargo-careful	0s
tests/stable	1m 31s
blas-msrv	1m 38s
tests/beta	1m 25s
tests/1.64.0	1m 21s
conclusion	0s
	10m 51s

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