feat(primitives): re-export foldhash #2235

Job	Run time
miri --no-default-features	4m 58s
test ubuntu-latest stable --no-default-features	54s
miri	5m 0s
clippy	44s
test ubuntu-latest stable	53s
check no_std	33s
miri --all-features	7m 33s
test ubuntu-latest nightly --no-default-features	47s
test ubuntu-latest nightly	46s
docs	30s
test ubuntu-latest 1.81 --no-default-features	31s
test ubuntu-latest 1.81	31s
fmt	11s
test windows-latest stable --no-default-features	3m 39s
features stable	1m 26s
test windows-latest stable	2m 41s
features stable --all-targets	2m 51s
wasm	33s
test windows-latest nightly --no-default-features	2m 22s
features nightly	1m 36s
features nightly --all-targets	2m 54s
test windows-latest nightly	1m 58s
test windows-latest 1.81 --no-default-features	1m 7s
test windows-latest 1.81	1m 4s
test ubuntu-latest 1.81 --features json	35s
test windows-latest 1.81 --features json	1m 30s
test ubuntu-latest nightly --all-features	1m 4s
test windows-latest nightly --all-features	2m 38s
deny / cargo deny check	15s
ci success	3s
	52m 7s

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