Allow shaders in screensavers

[hsyl20]

I'm not a huge fan of ASCII art for screensavers (and neither for the intro screen but that's for another discussion), I think they are at odd with the rest of the desktop visual quality (hyprland, etc.).

I think we could allow shaders to be used to create relatively power efficient screensavers. I've adapted an existing shader quickly with Claude and it's pretty nice:

screenrecording-2026-08-28_12-36-31.mp4

So my suggestion is: make shaders a first class option for screensavers.

Second suggestion: offer a built-in way to compare screensaver power consumption

Is it time for an Omarchy screensaver shader contest? :-)