docs: enable some useful rustdoc features on docs.rs (#850) #2266

Job	Run time
wasm	33s
miri --no-default-features	5m 19s
miri	5m 20s
miri --all-features	8m 0s
clippy	1m 12s
docs	52s
fmt	11s
features stable	2m 21s
features stable --all-targets	3m 32s
features nightly	2m 22s
test ubuntu-latest stable --no-default-features	1m 17s
features nightly --all-targets	3m 28s
test ubuntu-latest stable	1m 25s
check no_std	43s
test ubuntu-latest nightly --no-default-features	1m 15s
test ubuntu-latest nightly	1m 13s
test ubuntu-latest 1.81 --no-default-features	39s
test ubuntu-latest 1.81	40s
test windows-latest stable --no-default-features	2m 57s
test windows-latest stable	2m 29s
test windows-latest nightly --no-default-features	2m 37s
test windows-latest nightly	2m 51s
test windows-latest 1.81 --no-default-features	1m 40s
test windows-latest 1.81	1m 47s
test ubuntu-latest 1.81 --features json	42s
test windows-latest 1.81 --features json	1m 35s
test ubuntu-latest nightly --all-features	1m 20s
test windows-latest nightly --all-features	2m 53s
deny / cargo deny check	18s
ci success	1s
	1h 1m 32s

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