Show hidden files in find_files only when search string begins with "."

[iangreenleaf]

One thing I really liked about my previous vim file finder that I haven't figured out how to recreate in telescope was that hidden files were not displayed by default, but if the text you entered started with a ., it would enable hidden files. So for example typing .confoo would find .config/foobar but just typing foo would not. It was a really nice way to get access to the behavior in an intuitive way without having to remember yet another key binding.

Is this possible in telescope? Here's the closest question I've uncovered so far: #2874