feat: Turtle.get/set_Position ( Fixes #7 )

Author: James Brundage

Types/Turtle/get_Position.ps1

@@ -0,0 +1,4 @@
+if (-not $this.'.Position') {
+    $this |  Add-Member -MemberType NoteProperty -Force -Name '.Position' -Value [pscustomobject]@{ X = 0; Y = 0 }
+}
+return $this.'.Position'

Types/Turtle/set_Position.ps1

@@ -0,0 +1,26 @@
+param([double[]]$xy)
+$x, $y = $xy
+if (-not $this.'.Position') {
+    $this |  Add-Member -MemberType NoteProperty -Force -Name '.Position' -Value ([pscustomobject]@{ X = 0; Y = 0 })
+}
+$this.'.Position'.X += $x
+$this.'.Position'.Y += $y
+$posX, $posY = $this.'.Position'.X, $this.'.Position'.Y
+if (-not $this.'.Minimum') {
+    $this |  Add-Member -MemberType NoteProperty -Force -Name '.Minimum' -Value ([pscustomobject]@{ X = 0; Y = 0 })
+}
+if (-not $this.'.Maximum') {
+    $this |  Add-Member -MemberType NoteProperty -Force -Name '.Maximum' -Value ([pscustomobject]@{ X = 0; Y = 0 })
+}
+if ($posX -lt $this.'.Minimum'.X) {
+    $this.'.Minimum'.X = $posX
+}
+if ($posY -lt $this.'.Minimum'.Y) {
+    $this.'.Minimum'.Y = $posY
+}
+if ($posX -gt $this.'.Maximum'.X) {
+    $this.'.Maximum'.X = $posX
+}
+if ($posY -gt $this.'.Maximum'.Y) {
+    $this.'.Maximum'.Y = $posY
+}