feat: Turtle.Forward() ( Fixes #6 )

Author: James Brundage

Types/Turtle/Forward.ps1

@@ -0,0 +1,9 @@
+param(
+[double]
+$Distance = 10
+)
+
+$x = $Distance * [math]::round([math]::cos($this.Heading * [Math]::PI / 180),15)
+$y = $Distance * [math]::round([math]::sin($this.Heading * [Math]::PI / 180),15)
+$this.Position = $x, $y
+$this.Steps += "l $x $y"