FR: add yad to tldr-pages

[thiswillbeyourgithub]

Hi,

I think it would be great if we could usetldr yad to get a quick reminder of how to use yad for quick'n dirty scripts :)

Here's their link: https://github.com/tldr-pages/tldr Here's the guide to add yad: https://github.com/tldr-pages/tldr/blob/main/CONTRIBUTING.md