feat: add helper to forkchoice state (#1903) #5727

Job	Run time
wasm-unknown	3m 1s
doctest	3m 24s
wasm-wasi	4m 33s
test ubuntu-latest stable --no-default-features	2m 57s
check no_std	1m 13s
clippy	1m 53s
test ubuntu-latest stable	2m 47s
test ubuntu-latest stable --all-features	3m 27s
test ubuntu-latest nightly --no-default-features	2m 35s
docs	2m 7s
fmt	10s
test ubuntu-latest nightly	2m 45s
test ubuntu-latest nightly --all-features	3m 3s
feature-checks	9m 34s
test ubuntu-latest 1.81 --no-default-features	1m 53s
test ubuntu-latest 1.81	2m 2s
test windows-latest stable --no-default-features	7m 17s
test windows-latest stable	6m 13s
test windows-latest stable --all-features	8m 20s
test windows-latest nightly --no-default-features	5m 37s
test windows-latest nightly	5m 47s
test windows-latest nightly --all-features	7m 55s
test windows-latest 1.81 --no-default-features	4m 28s
test windows-latest 1.81	4m 11s
deny / cargo deny check	22s
ci success	2s
	1h 37m 36s

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