feat: implement checkout service and payment processing integration

app/Domains/Integration/Services/Contracts/PaymentProviderInterface.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Domains\Integration\Services\Contracts;
+
+interface PaymentProviderInterface
+{
+    /**
+     * Procesa un pago con las credenciales específicas del Tenant.
+     *
+     * @param array $paymentData Datos del pago, incluyendo el método (ej. qr, transferencia).
+     * @param array $credentials Credenciales encriptadas previamente configuradas por el Tenant.
+     * @return array
+     */
+    public function process(array $paymentData, array $credentials): array;
+}

app/Domains/Integration/Services/PaymentProviderFactory.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Domains\Integration\Services;
+
+use App\Domains\Integration\Services\Contracts\PaymentProviderInterface;
+use App\Domains\Integration\Services\Providers\TelepagosProvider;
+use InvalidArgumentException;
+
+class PaymentProviderFactory
+{
+    public function make(string $integrationCode): PaymentProviderInterface
+    {
+        return match ($integrationCode) {
+            'telepagos' => new TelepagosProvider(),
+            default => throw new InvalidArgumentException("Integración de pago no soportada: {$integrationCode}"),
+        };
+    }
+}

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.');
+    }
+}