Moved PreviewGenerationException to PreviewGenerator module

module/PreviewGenerator/src/Exception/PreviewGenerationException.php

@@ -0,0 +1,17 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\PreviewGenerator\Exception;
+
+use RuntimeException;
+
+use function sprintf;
+
+/** @deprecated */
+class PreviewGenerationException extends RuntimeException
+{
+    public static function fromImageError(string $error): self
+    {
+        return new self(sprintf('Error generating a preview image with error: %s', $error));
+    }
+}