Add Effekseer files

Hey, guys.

Effekseer files have been added. Effekseer files can be used in RPG Maker MZ and other applications. For more information, please check the official Effekseer website.

Effekseer - Particle Effect Creation tool
https://effekseer.github.io/en/

The one for Godot can be found here.

GitHub - effekseer/EffekseerForGodot3
https://github.com/effekseer/EffekseerForGodot3