chunk example is slower than lodash's chunk

[guoyunhe]

I did a performance test with vitest:

Source	ops/sec (higher is better)
lodash	5.24m
you don't need lodash	4.31m
you might not need lodash	7.41m

So I think you should take a look at https://youmightnotneed.com/lodash/#chunk which is way more efficient than current example in this repo.

const chunk = (arr, chunkSize = 1, cache = []) => {
  const tmp = [...arr]
  if (chunkSize <= 0) return cache
  while (tmp.length) cache.push(tmp.splice(0, chunkSize))
  return cache
}