Add more specific exceptions

src/Exception/MessageAlreadyFinished.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Nsq\Exception;
+
+use Nsq\Message;
+use RuntimeException;
+
+final class MessageAlreadyFinished extends RuntimeException implements NsqException
+{
+    public static function finish(Message $message): self
+    {
+        return new self('Can\'t finish message as it already finished.');
+    }
+
+    public static function requeue(Message $message): self
+    {
+        return new self('Can\'t requeue message as it already finished.');
+    }
+
+    public static function touch(Message $message): self
+    {
+        return new self('Can\'t touch message as it already finished.');
+    }
+}