Added Loom blocks

these don't support doing patterns yet, but their inventories work.

src/block/inventory/LoomInventory.php

@@ -0,0 +1,46 @@
+<?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\block\inventory;
+
+use pocketmine\player\Player;
+use pocketmine\world\Position;
+
+final class LoomInventory extends BlockInventory{
+	public const SLOT_BANNER = 0;
+	public const SLOT_DYE = 1;
+	public const SLOT_PATTERN = 2;
+
+	public function __construct(Position $holder, int $size = 3){
+		parent::__construct($holder, $size);
+	}
+
+	public function onClose(Player $who) : void{
+		parent::onClose($who);
+
+		foreach($this->getContents() as $item){
+			$who->dropItem($item);
+		}
+		$this->clearAll();
+	}
+}