Refactor FlxPieDial, add FlxRadialGauge

[Geokureli]

FlxPieDial

• Fixed issue where the background of the dial was black, instead of transparent. Fixes FlxPieDial black border #430
• Moved drawing logic to util, so it can be used by FlxRadialGauge

FlxRadialWipeShader

• Shader that masks sprite radially, can be applied to of any static sprite (doesn't work with animations, yet, but neither did FlxPieDial). Shaders only work on non-Flash targets

FlxRadialGauge

Meant to replace FlxPieDial on non-flash targets, better on all fronts.

• Uses FlxRadialWipeShader via setOrientation(start, end)
• FlxPieDialUtils to allow you to draw a radial gauge akin to FlxPieDial via makeShapeGraphic(shape, radius, innerRadius, color)

Screen.Recording.2024-09-25.at.5.05.42.PM.mov

[Vortex2Oblivion]

Would be a cool addition!