feat(collections/unstable): support `Iterable` argument in `slidingWindows`

[Liam-Tait]

Support Iterable for slidingWindows

While working here I have made the errors a bit more granular.

With light benchmarking I have also made the array use case around ~2x faster (on my machine).

• [x] Remove the benchmark before merging (causing lint error as it is not exported)

#5470