cubic bezier animation for workflow

[roodkcab]

use cubic bezier in workflow to calculate deltaX for animation like css

var bezier1 = self.CubicBezier(0, 0, 1, 1);
var bezier2 = self.CubicBezier(0.25, 0, 0.25, 1);
self.AddAnimation(IGuiAnimation::CreateAnimation(func (time: UInt64): void {
    var changeTime = (cast double (time % (cast UInt64 2000))) / 2000;
    var b1 = bezier1(changeTime);
    var b2 = bezier2(changeTime);