Quality setting

[Inateno]

The dev should be able to set multiple qualities in the "images json file".

For example.

I make my game with a 19201080 quality (so I declare a render with sizes 19201080).
Then I decide to create a 720p quality mode (1280*720), so I will create a folder dedicated with all original assets resized to this ratio.

In the engine, everything that need this ratio should use it internally as much as possible (moveTo, translate, etc).
And the user can get this "qualityRatio" at any time for custom logic.

Also, changing quality setting should reload all assets currently loaded (the best is to dynamically downsize assets if it's already loaded).