Function arrow

arrow(
    origin: Geometry.Point,
    from: "tip" | "tail" | "middle",
    opts?: ArrowOpts,
): readonly Geometry.Point[]
Returns the points forming an arrow.
Parameters
- origin: Geometry.Point
  Origin of arrow
- from: "tip" | "tail" | "middle"
  Does origin describe the tip, tail or middle?
- opts: ArrowOpts = {}
  Options for arrow
Returns readonly Geometry.Point[]
Example: Create an arrow anchored by its tip at 100,100
```
const opts = {
 tailLength: 10,
 arrowSize: 20,
 tailThickness: 5,
 angleRadian: degreeToRadian(45)
}
const arrow = Shapes.arrow({x:100, y:100}, `tip`, opts); // Yields an array of points

// Eg: draw points
Drawing.connectedPoints(ctx, arrow, {strokeStyle: `red`, loop: true});
```