Add Clight as a way to control both backlight and gamma

[Federico Di Pierro]

Hi!
I am the dev of Clight; it is a tool that manages screen backlight capturing ambient light from:

• webcam
• ambient light sensors

Moreover, it is able to manage keyboard backlight, dimming, dpms and gamma temp.
I think it would be a great addition to the list, given that it supports wayland :)
Thank you!

[Natalie Pendragon]

I think so too! Please feel to open a pull request and I'll accept.