feat: Implement Plesk domain and hosting services

- Added PleskDomainService for managing domain operations (create, update, remove, get info).
- Introduced PleskHostingService for provisioning hosting accounts and notifying customers.
- Created PleskService for handling API requests to Plesk.
- Added migration to include 'type' column in dns_manager_servers table.
- Created migration for module_hosting_accounts table to track hosting subscriptions.
- Created migration for module_hosting_plesk_clients table to manage Plesk client credentials.
- Added email templates for notifying customers and admins about hosting account creation.

app/Mail/Admin/HostingAccountCreatedAdminNotification.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mail\Admin;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class HostingAccountCreatedAdminNotification extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public function __construct(public readonly array $data) {}
+
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: '[ADMIN] Hosting account mới — ' . ($this->data['domain_name'] ?? 'N/A'),
+        );
+    }
+
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.admin.hosting-account-created',
+            with: $this->data,
+        );
+    }
+
+    public function attachments(): array
+    {
+        return [];
+    }
+}