feat: Turtle.Push() ( Fixes #91 )

Author: StartAutomating

Types/Turtle/Push.ps1

@@ -0,0 +1,9 @@
+if (-not $this.'.Stack') {
+    $this | Add-Member NoteProperty '.Stack' ([Collections.Stack]::new()) -Force
+}
+
+$this.'.Stack'.Push(@{
+    Position = [Ordered]@{X=$this.Position.X;Y=$this.Position.Y}
+    Heading = $this.Heading
+})
+return $this