[Ripple][Feature Request] Add pin 45 screen backlight support for the LilyGo T-Deck Pro V1.1

[pelgraine]

LilyGO’s T-Deck Pro v1.1 (released 26 December 2025) has a screen backlight added at IO45. It would be great if we could switch this on and off with a keyboard shortcut.

See https://github.com/Xinyuan-LilyGO/T-Deck-Pro/tree/HD-V2-250915?tab=readme-ov-file#zero-version-

[pelgraine]

Closing this as LilyGo have just got back to me and reported that the current v1.1 backlight has issues that they need to resolve, and once that's done they'll work with firmware developers to make it available.