feat(dump): locate mysqldump/mariadb-dump binary

src/Service/Exception/DumpBinaryNotFoundException.php

@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace AeonDumpManager\Service\Exception;
+
+use RuntimeException;
+
+class DumpBinaryNotFoundException extends RuntimeException
+{
+    public static function create(array $searched): self
+    {
+        return new self(sprintf(
+            'Could not find a dump binary. Searched for: %s. Configure "dumpBinaryPath" in the plugin settings to point at one explicitly.',
+            implode(', ', $searched)
+        ));
+    }
+}