feat: add domain registration form and email notifications

- Create a new Blade view for domain registration (`registrant-tochuc.blade.php`) to capture organization and manager details.
- Implement email templates for new domain orders for both admin (`domain-order-new.blade.php`) and customers (`domain-order-received.blade.php`).
- Add CSV exports for client and domain data.
- Introduce tests for customer mass assignment, password reset, login throttling, and permission gating.
- Ensure service renewals use current pricing and validate ownership for virtual machines.
- Validate mass assignment behavior in service model.

app/Http/Requests/Api/Admin/Domain/UpdateRegistrantInfoRequest.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Http\Requests\Api\Admin\Domain;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class UpdateRegistrantInfoRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'registrant_type' => ['required', 'in:individual,organization'],
+            'registrant_info' => ['required', 'array'],
+        ];
+    }
+}