feat: Add DNS management resources and importer

- Implemented DomainCollection, DomainDetailResource, DomainNSCollection, DomainNSResource, and DomainResource for handling DNS domain and record data.
- Created VpsServiceCollection and VpsServiceResource for VPS service management.
- Added DnsManagerNS and DnsManagerUser models to represent DNS records and user associations.
- Developed AdminZoneDnsSqlImporter for importing DNS data from SQL dumps, including customer and DNS domain records.
- Added migration scripts to update the customers table with new fields and sync foreign key references for DNS tables.
- Created a migration preview document outlining the mapping and schema changes for the admin zone DNS import.

app/Http/Resources/Api/Service/DomainDetailResource.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Http\Resources\Api\Service;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class DomainDetailResource extends JsonResource
+{
+    public function __construct($resource, protected mixed $records = null)
+    {
+        parent::__construct($resource);
+    }
+
+    /**
+     * Transform the resource into an array.
+     *
+     * @return array<string, mixed>
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            'domain' => new DomainResource($this->resource),
+            'ns_count' => (int) ($this->record_count ?? 0),
+            'records' => $this->records ? new DomainNSCollection($this->records) : [
+                'items' => [],
+                'pagination' => [
+                    'total' => 0,
+                    'per_page' => 0,
+                    'current_page' => 1,
+                    'last_page' => 1,
+                ],
+            ],
+        ];
+    }
+}