feat: Gradient.GradientType ( Fixes #16 )

Author: StartAutomating

Types/Gradient/Alias.psd1

@@ -0,0 +1,3 @@
+@{
+    GradientTypes = 'GradientType'
+}

Types/Gradient/get_GradientType.ps1

@@ -0,0 +1,20 @@
+<#
+.SYNOPSIS
+    Gets the Gradient Type
+.DESCRIPTION
+    Gets the Gradient Types found in the Gradient's input.
+
+    If no type is found, radial-gradient is the default.
+#>
+
+$foundTypes = @(foreach ($in in $this.input) {
+    if ($in -match $this.GradientTypePattern) {
+        $in -replace '(?:-gradient)?$', '-gradient'
+    }
+})
+
+if (-not $foundTypes) {
+    $foundTypes = @('radial-gradient')    
+}
+return $foundTypes
+