feat: Add Blob type that behaves like Bytes #5760

Job	Run time
wasm-wasi	50s
test ubuntu-latest stable --no-default-features	1m 35s
check no_std	21s
clippy	42s
test ubuntu-latest stable	1m 25s
docs	1m 3s
test ubuntu-latest stable --all-features	2m 22s
feature-checks	34s
test ubuntu-latest nightly --no-default-features	1m 6s
fmt	12s
wasm-unknown	30s
test ubuntu-latest nightly	1m 14s
test ubuntu-latest nightly --all-features	1m 43s
doctest	1m 31s
test ubuntu-latest 1.81 --no-default-features	40s
test ubuntu-latest 1.81	31s
test windows-latest stable --no-default-features	4m 4s
test windows-latest stable	5m 42s
test windows-latest stable --all-features	6m 49s
test windows-latest nightly --no-default-features	3m 38s
test windows-latest nightly	3m 42s
test windows-latest nightly --all-features	4m 23s
test windows-latest 1.81 --no-default-features	2m 36s
test windows-latest 1.81	1m 44s
deny / cargo deny check	23s
ci success	2s
	49m 22s

Provide feedback