feat: `BumpBox::<[MaybeUninit<T>]>::init_fill_iter` (fixes #24) #63

Job	Run time
clippy-benches	25s
test	2m 37s
format	12s
clippy (1.64.0, --no-default-features)	1m 26s
clippy (stable, --no-default-features)	25s
clippy (nightly, --all-features, --tests)	29s
	5m 34s

Provide feedback