Created TagConflictException

module/Core/src/Exception/TagConflictException.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\Exception;
+
+use function sprintf;
+
+class TagConflictException extends RuntimeException
+{
+    public static function fromExistingTag(string $tag): self
+    {
+        return new self(sprintf('Tag with name %s already exists', $tag));
+    }
+}