Add script to automatize question count update

Title sums it up pretty, how do you update the question count in the README? is it automatically? if so I didn't see how it's done

Start with the question count shown in the README and inspect the repository for the files or entry points that maintain it. The issue does not identify an existing script, workflow, or test, so clarify the intended source of truth; done means the count can be updated consistently without manual editing.

Written by the indexing model from the issue text.