Add curated topic for DragonRuby

Author: Chadowo

topics/dragonruby/dragonruby.png

@@ -0,0 +1,13 @@
+---
+aliases: dragonruby-gtk, dragonrubygtk
+created_by: Amir Rajan and Ryan C. Gordon
+display_name: DragonRuby Game Toolkit
+logo: dragonruby.png
+related: ruby, game-engine, game-development
+released: 2019
+short_description: A perfomant, cross-platform 2D game engine.
+topic: dragonruby
+url: https://dragonruby.org/
+---
+DragonRuby is a perfomant, cross-platform 2D game engine that's indie-focused, productive and easy to use. It uses
+Ruby as a scripting language and targets desktop, mobile, web, and console platforms.