feat: Add Blob type that behaves like Bytes #5757

Job	Run time
wasm-unknown	33s
wasm-wasi	41s
doctest	1m 15s
test ubuntu-latest stable --no-default-features	1m 30s
check no_std	32s
test ubuntu-latest stable	1m 27s
docs	20s
clippy	27s
feature-checks	34s
fmt	11s
test ubuntu-latest stable --all-features	47s
test ubuntu-latest nightly --no-default-features	1m 6s
test ubuntu-latest nightly	1m 16s
test ubuntu-latest nightly --all-features	47s
test ubuntu-latest 1.81 --no-default-features	40s
test ubuntu-latest 1.81	31s
test windows-latest stable --no-default-features	1m 52s
test windows-latest stable	1m 53s
test windows-latest stable --all-features	1m 52s
test windows-latest nightly --no-default-features	1m 52s
test windows-latest nightly	1m 53s
test windows-latest nightly --all-features	1m 48s
test windows-latest 1.81 --no-default-features	1m 46s
test windows-latest 1.81	1m 45s
deny / cargo deny check	22s
ci success	4s
	27m 44s

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