feat: Turtle.get/set_FillRule ( Fixes #109 )

Author: James Brundage

Types/Turtle/get_FillRule.ps1

@@ -0,0 +1,8 @@
+if (-not $this.'.PathAttribute') {
+    $this | Add-Member -MemberType NoteProperty -Name '.PathAttribute' -Value ([Ordered]@{}) -Force
+}
+if ($this.'.PathAttribute'.'fill-rule') {
+    return $this.'.PathAttribute'.'fill-rule'
+} else {
+    'nonzero'
+}

Types/Turtle/set_FillRule.ps1

@@ -0,0 +1,6 @@
+param(
+[ValidateSet('nonzero', 'evenodd')]
+[string]
+$fillRule = 'nonzero'
+)
+$this.PathAttribute = [Ordered]@{'fill-rule' = $fillRule.ToLower()}