Please add a screenshot with command docstrings shown to the README

[piotrklibert]

I'm not sure if there are many people like me, but I avoided using this project for years because it seemed pretty useless to me, based on the screenshots and description in the README. At the end of last year, I did a major overhaul of my Emacs config and decided to take a closer look at the customization options. There I discovered that which-key is able to also display docstrings - and that is immensely more useful to me than displaying just the command names. Coupled with the ability to set columns' widths and paging, it gives a wonderful, quick overview of what will really happen when I press some key. I think "seeing is believing" has a certain amount of truth to it, so if there are others like me, including a screenshot like this will help them decide to use which-key:

[justbur]

I can do that. Do I have your permission to use this one?

[piotrklibert]

@justbur Obviously, yes! Sorry, I didn't get the notification for some reason; fortunately, I'm cleaning up my TODO and found a mention of this ticket. Sorry it took so long :)