add rarity preset

src/Test/Rarity/Common.php

@@ -0,0 +1,8 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenLegends\Asset\Test\Rarity;
+
+class Common extends \OpenLegends\Engine\Abstract\Rarity
+{}

src/Test/Rarity/Rare.php

@@ -0,0 +1,8 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenLegends\Asset\Test\Rarity;
+
+class Rare extends \OpenLegends\Engine\Abstract\Rarity
+{}