feat: Turtle.get/set_Start ( Fixes PoshWeb#245 )

Author: StartAutomating

Types/Turtle/get_Start.ps1

@@ -0,0 +1,11 @@
+<#
+.SYNOPSIS
+    Gets the Start Vector a Turtle
+.DESCRIPTION
+    Gets the starting vector for a Turtle.
+
+    Setting this value avoids an automatic calculation of a starting position.
+.EXAMPLE
+    turtle width 300 height 300 start 50 square 200 start
+#>
+return $this.'.Start'

Types/Turtle/set_Start.ps1

@@ -0,0 +1,31 @@
+<#
+.SYNOPSIS
+    Sets the Start Vector for a Turtle
+.DESCRIPTION
+    Sets the starting vector for a Turtle.
+
+    This avoids an automatic calculation of a starting position
+.EXAMPLE
+    turtle width 300 height 300 start 50 square 200
+#>
+param(
+[PSObject]
+$Value
+)
+
+
+$aNewStart = 
+    if ($value -is [object[]] -and $value -as [float[]]) {
+        [Numerics.Vector2]::new($value -as [float[]])
+    } elseif ($value.GetType -and $value.GetType().IsPrimitive) {
+        [Numerics.Vector2]::new($value,$value)
+    } elseif ($value.X -and $value.Y) {
+        [Numerics.Vector2]::new($value.X,$value.Y)
+    }
+
+if ($aNewStart) {
+    $this | Add-Member NoteProperty '.Start' $aNewStart -Force
+}
+
+
+