Use Builder style when creating UText objects

[alecxvs]

Instead of piling all the parameters into mysterious nonsense, use a style of builder pattern of creating UText objects.

Expectation:

UText()
  .addText("My Text")
  .applyColor(-4, Color.Red) --Applies the color to the last 4 characters; from the right
  .addText(" is fantastic")
  .applyColor(Color.Green) --Applies the color to the last added text (" is fantastic")
  .addText("!!!!!!!!!!")
  .applyColor(3, Color.Orange) --Applies the color to the first 3 characters; from the left
  .addText(" This is great")
  .applyColor(10, 15, Color.Yellow) --Applies the color to characters 10 through 15 (1-indexed), or "great"
  .optimize()

Format objects will be expected to add apply(Format) functions to UTextBuilder. If this isn't possible with the class system, some alternative with automated magic will be provided (like .applyFormat(-4, Format("Color", Color.Red)) )

The following more traditional style would also be acceptable (this is what would internally be happening when you use builder methods):

UText({
  text = "My Text is fantastic!!!!!!!!!! This is great"
  formats = {
    Format("Color", Color.Red).applyTo(4, 7),
    Format("Color", Color.Green).applyTo(8, 13),
    Format("Color", Color.Orange).applyTo(14, 16),
    Format("Color", Color.Yellow).applyTo(26, 30)
  }
})