feat(mail-test): implement email testing functionality

- Created MailTestController to handle email sending requests.
- Added SendTestMailRequest for validating email input.
- Developed MailTestService to manage email sending logic.
- Introduced TestMail Mailable for formatting test emails.
- Defined API route for sending test emails.
- Created EmailIntegrationSeeder to seed email integration settings.
- Updated DatabaseSeeder to include EmailIntegrationSeeder.
- Added MailTestControllerTest to ensure email sending functionality works as expected.

database/seeders/DatabaseSeeder.php

@@ -30,6 +30,7 @@ class DatabaseSeeder extends Seeder
             ProductCatalogFromImagesSeeder::class,
             FiestaFutbolInfantilProductSeeder::class,
             TelepagosIntegrationSeeder::class,
+            EmailIntegrationSeeder::class,
             MenuSeeder::class,
         ]);
     }

database/seeders/EmailIntegrationSeeder.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Domains\Integration\Models\Integration;
+use Illuminate\Database\Seeder;
+
+class EmailIntegrationSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     */
+    public function run(): void
+    {
+        Integration::updateOrCreate(
+            ['integration_code' => 'email'],
+            [
+                'name' => 'Email',
+                'url' => null,
+                'integration_data_schema' => [
+                    'MAIL_MAILER' => 'required|string|in:smtp',
+                    'MAIL_SCHEME' => 'required|string|in:smtp',
+                    'MAIL_HOST' => 'required|string|in:smtp.gmail.com',
+                    'MAIL_PORT' => 'required|integer|in:587',
+                    'MAIL_USERNAME' => 'required|email',
+                    'MAIL_PASSWORD' => 'required|string',
+                    'MAIL_FROM_ADDRESS' => 'required|email',
+                ],
+            ]
+        );
+    }
+}