Replacing `int` lengths with `size_t`?

[SabrinaJewson]

This library often uses int to measure the lengths of arrays – but this isn’t ideal, since it forbids arrays of over 4 billion elements for no reason, and I think in lots of cases it could just be fixed by using size_t instead. I don’t particularly need the functionality, it just makes it easier to use from other languages. I’m opening this issue to gauge if there’s interest in switching?

[jorenham]

Agreed. Other languages like rust don't even have a C int (or at least, not natively), whereas it does have usize (i.e. size_t).

[CodeHermit17]

I'd like to work on this if it's still open. I noticed PR #53 takes a template approach for handling integer types rather than a straight replacement. Should the same approach be applied here for int lengths, or is size_t still the preferred direction? Also want to make sure this won't conflict badly with #53 before I start.