Merge pull request #4420 from astrochili/topic-defold

Add `defold` topic

Author: kenyonj

topics/defold/defold.png

@@ -0,0 +1,14 @@
+---
+aliases: defold-engine, defold-game-engine, defold-module, defold-extension, defold-library
+created_by: Defold Foundation, originally by Christian Murray and Ragnar Svensson
+display_name: Defold
+github_url: https://github.com/defold
+logo: defold.png
+released: March 16, 2016
+short_description: A cross-platform game engine for high-performance games on desktop, mobile, web and consoles.
+topic: defold
+related: lua, game-developmment
+url: https://defold.com/
+wikipedia_url: https://en.wikipedia.org/wiki/Defold
+---
+Defold is a free and source-available game engine with a focus on high-performance. It uses Lua, a scripting language, and allows you to create games for desktop, mobile, web, and console platforms.