Maintainance?

Hi, I think this library could be used more. For example, providing a sortBy function that works similar to how Python's default sort(key=) works.

In Python, we have @cmp_to_key, but in TS/JS, developers can just use the regular sort function, so providing a Pytho-like sort is very powerful.

Start by reviewing the js-functools repository and its existing function utilities; compare the proposed sortBy behavior with JavaScript/TypeScript sort and Python's key-based sorting. Clarify the API and acceptance criteria before implementing, since the issue does not identify files or tests.

Written by the indexing model from the issue text.