Add alias for the old class

Author: arokettu

src/CzechNationalBankService.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Peso\Services;
+
+use Peso\Services\CzechNationalBank\CentralBankFixingService;
+
+class_alias(CentralBankFixingService::class, CzechNationalBankService::class);
+
+// phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols
+if (false) {
+    /**
+     * @deprecated PesoServiceInterface
+     */
+    final readonly class CzechNationalBankService extends CentralBankFixingService
+    {
+    }
+}