Multiple outlines, shadows and gradients for FlxText

Presently, it is very difficult to make a FlxText look distinct. I wish to improve FlxText to make it possible to have multiple outlines, multiple shadows, gradients, and perhaps other effects. What I would like would be a breaking change, so before I go ahead and try it, I'd like some feedback.

I would like to change the following:-

• Remove borderStyle and its related properties. (Since when did a shadow count as a border?)
• Make a general FlxTextEffect to represent the various filters.
• Make a FlxTextOutline, FlxTextGradient, and FlxTextShadow.
• Add an array of FlxTextEffects to FlxText.
• Add shorthand methods, addOutline(), addShadow(), and addGradient()?

Note that effects would be applied cumulatively. This would make text significantly more customizable. Instead of just having a single border or outline, you could have outlined text with a shadow, or shadowed text with an outline around the shadow etc..

The issue names no files, tests, or entry points. Start by reviewing the existing FlxText borderStyle and related properties, then seek maintainer feedback on the proposed FlxTextEffect hierarchy and cumulative effects. The issue has no agreed acceptance criteria, so completion would require an approved design before implementation.