Add OpenFL game engine

OpenFL is cross platform development engine  supporting compilation to iOS , Android , HTML5 and other platforms

Signed-off-by: flashultra <[email protected]>

Author: flashultra

collections/game-engines/index.md

@@ -57,6 +57,7 @@ items:
  - o3de/o3de
  - luanti-org/luanti
  - defold/defold
+ - openfl/openfl
 display_name: Game Engines
 created_by: leereilly
 ---