feat: implement checkout service and payment processing integration

app/Domains/Integration/Services/Providers/TelepagosProvider.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Domains\Integration\Services\Providers;
+
+use App\Domains\Integration\Services\Contracts\PaymentProviderInterface;
+use BadMethodCallException;
+
+class TelepagosProvider implements PaymentProviderInterface
+{
+    public function process(array $paymentData, array $credentials): array
+    {
+        // TODO: Implementar lógica de comunicación con Telepagos (usando $paymentData['payment_method'])
+        throw new BadMethodCallException('Método de pago no implementado para Telepagos.');
+    }
+}