Implement new 1.21 copper blocks (#6366)

Added the following new blocks:
- All types of Copper Bulb
- All types of Copper Door
- All types of Copper Trapdoor
- All types of Chiseled Copper
- All types of Copper Grate

src/block/CopperBulb.php

@@ -0,0 +1,69 @@
+<?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;
+
+use pocketmine\block\utils\CopperOxidation;
+use pocketmine\block\utils\CopperTrait;
+use pocketmine\block\utils\ICopper;
+use pocketmine\block\utils\LightableTrait;
+use pocketmine\block\utils\PoweredByRedstoneTrait;
+use pocketmine\data\runtime\RuntimeDataDescriber;
+
+class CopperBulb extends Opaque implements ICopper{
+	use CopperTrait;
+	use PoweredByRedstoneTrait;
+	use LightableTrait{
+		describeBlockOnlyState as encodeLitState;
+	}
+
+	protected function describeBlockOnlyState(RuntimeDataDescriber $w) : void{
+		$this->encodeLitState($w);
+		$w->bool($this->powered);
+	}
+
+	/** @return $this */
+	public function togglePowered(bool $powered) : self{
+		if($powered === $this->powered){
+			return $this;
+		}
+		if ($powered) {
+			$this->setLit(!$this->lit);
+		}
+		$this->setPowered($powered);
+		return $this;
+	}
+
+	public function getLightLevel() : int{
+		if ($this->lit) {
+			return match($this->oxidation){
+				CopperOxidation::NONE => 15,
+				CopperOxidation::EXPOSED => 12,
+				CopperOxidation::WEATHERED => 8,
+				CopperOxidation::OXIDIZED => 4,
+			};
+		}
+
+		return 0;
+	}
+}