feat: Turtle.Pop() ( Fixes PoshWeb#92 )

Author: StartAutomating

Types/Turtle/Pop.ps1

@@ -0,0 +1,12 @@
+if ($this.'.Stack' -isnot [Collections.Stack]) {
+    return
+}
+
+if ($this.'.Stack'.Count -eq 0) {
+    return
+}
+
+$popped = $this.'.Stack'.Pop()
+$this.PenUp().Goto($popped.Position.X, $popped.Position.Y).PenDown()
+$this.Heading = $popped.Heading
+return $this