Feature - Clip skewing and tweens

[StickmanRed]

Changes

• Added skew property to Wick.Transformation, Wick.Clip, and Wick.Tween.
• Added fromMatrix and toMatrix functions to Wick.Transformation.
  • These functions use Ruffle code as a reference. Since Ruffle is designed to replicate Flash projects, and the skew tweens act visually similar to Adobe classic tweens, I decided to refer to the above.
• Replaced instances where Wick.Clip uses or sets paper.Matrix transformations.

Requires an engine build to test.
Currently, this does not add a skew property to Wick.Selection, so clip skews cannot be changed in the Inspector. The selection box design isn't currently equipped to handle skew.