Fixed chat and some TextContainer documentation issues

src/pocketmine/command/CommandSender.php

@@ -23,12 +23,13 @@ declare(strict_types=1);
 
 namespace pocketmine\command;
 
+use pocketmine\event\TextContainer;
 use pocketmine\permission\Permissible;
 
 interface CommandSender extends Permissible{
 
 	/**
-	 * @param string $message
+	 * @param TextContainer|string $message
 	 */
 	public function sendMessage($message);
 

src/pocketmine/command/ConsoleCommandSender.php

@@ -102,7 +102,7 @@ class ConsoleCommandSender implements CommandSender{
 	}
 
 	/**
-	 * @param string $message
+	 * @param TextContainer|string $message
 	 */
 	public function sendMessage($message){
 		if($message instanceof TextContainer){