add support for hyper key of hyperkey.app

I have tried to use yabai&skhd and bind hyper for couple of commands. I am using the hyperkey.app from Ryan Hanson (links below) . It's implementation of the function of "hyper" is different from the one in Karabiner Element and it may not work (as the developer say in blog post below).
please implement higher event stream in skhd so users can be use hyperkey.app (It is not hearting the support for Karabiner Element).

[hyperkey website: https://hyperkey.app/](https://hyperkey.app/)
[blog post: https://ryanhanson.dev/posts/hyperkey](https://ryanhanson.dev/posts/hyperkey)

Start by reading the hyperkey.app website and Ryan Hanson's linked blog post to understand how its Hyper key events differ from Karabiner Elements. Then trace skhd's event-stream handling and determine the required integration boundary. Done means hyperkey.app bindings work without breaking existing Karabiner Elements support; no test or file is named in the issue.

Written by the indexing model from the issue text.