elkowar/eww ? reverse-engineered prompt

Build me a desktop widget app for Linux that lets me make my own custom widgets and place them on any window manager. I want it to feel like a flexible little dashboard or bar replacement, with simple config driven widgets, windows, and layouts that can show things like system info, clocks, launchers, and status panels.

Please make it runnable from the command line, include a few working example setups, and write clear docs for installing it and getting started. It should be easy for someone to copy a sample config, change a few values, and see a bar or widget pop up right away. If some details depend on current GTK or Rust docs, look them up online if you need to.

Also make sure the project is structured so it is easy to extend later with new widgets and features, and include a migration path or notes if there is an older config style that needs updating.