Naive option picker (fzf) in pure shell

 I've been a big fan of option pickers since.... forever. I've used ratmenu, ratmen, dmenu, dzen, percol, fzf, helm, vertico, consul...

For me, it's so fundamental that I need this functionality in every piece of code/script I write.

Finally I got to a working version of a very small version of it.

As always, pure shell, but with some advanced features can give you a succint function that works predictably.  The /dev/tty part was the trickiest to get working, as I didn't know how to get input from a pipe, and at the same time be able to read data from the keyboard.