Add Asus Zenbook ux535

[Green-D-683]

Description of changes

Added Asus Zenbook Pro ux535

Things done

I've been using NixOS on this laptop for a while now, so I figured my configuration was hopefully stable enough to be upstreamed here for others to use. All values were taken from my config, along with some other values that I've found to cause bugs if set turned off.

I found the contributing docs to be outdated when it came to running the testing python script, it seems to have had major changes made three weeks ago that have changed it's usage. The command: ./tests/run.py --jobs 4 --verbose --nixos-hardware ./. worked for me to test all modules, I couldn't figure out how we're now meant to test only a single module (--jobs 4 is only because I ran out of Memory without a limit, and it ran quickly enough with 4 without using too much, you could probably increase this or just remove it.).

• [/] Tested the changes in your own NixOS Configuration
• [/] Tested the changes end-to-end by using your fork of nixos-hardware and
  importing it via <nixos-hardware> or Flake input