RABG: Add Beaten Badges to RetroAchievements sɣur alp

On a RetroAchievements user profile page, this extension:
1. Reads the "Completion Progress" list for every game marked as "beaten".
2. Sorts them by completion percentage (highest first).
3. Adds them to the "Game Awards" grid with a silver frame.
4. Adds a second counter with a silver crown icon for beaten games.

At the very bottom of the page (i.e. the footer section of the website), there'll be a settings section that lets you adjust the way the beaten badges are sorted.

Source code: https://github.com/sakci/rabg

This project is licensed under the MIT License. It is fully free and open-source, and it will remain so.