Almamu/linux-wallpaperengine ? reverse-engineered prompt

Build me a Linux app that can run animated Wallpaper Engine backgrounds on my desktop.

I want it to feel like a normal wallpaper app, but for Wallpaper Engine workshop backgrounds, so I can point it at a Steam workshop ID or a folder path and have it play the live wallpaper in the background. It should work on Linux with either X11 or Wayland, use OpenGL for rendering, and automatically find the Wallpaper Engine assets if Steam is installed in a common location. If it can’t find them, let me pass an assets folder path manually from the command line.

Please make it easy to build from source with CMake, and set it up so it creates a runnable output folder after building. If there are any tricky dependency or asset detection details, handle them gracefully and show a clear message instead of failing silently. Feel free to look up current docs online if you need to.