ItemFactory: register some easy items

these are items that do nothing and/or are only used for crafting. As such they are simple to add.

Others will be added later on, but others require extra work and/or reverse engineering which I don't have time for now.

src/pocketmine/item/DriedKelp.php

@@ -0,0 +1,38 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\item;
+
+class DriedKelp extends Food{
+	public function __construct(int $meta = 0){
+		parent::__construct(self::DRIED_KELP, $meta, "Dried Kelp");
+	}
+
+	public function getFoodRestore() : int{
+		return 1;
+	}
+
+	public function getSaturationRestore() : float{
+		return 0.6;
+	}
+}