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/DomainCollection.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Http\Resources\Api\Service;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\ResourceCollection;
+
+class DomainCollection extends ResourceCollection
+{
+    public $collects = DomainResource::class;
+
+    /**
+     * Transform the resource collection into an array.
+     *
+     * @return array<string, mixed>
+     */
+    public function toArray(Request $request): array
+    {
+        $data = [
+            'items' => $this->collection,
+        ];
+
+        if (method_exists($this->resource, 'total')) {
+            $data['pagination'] = [
+                'total' => $this->resource->total(),
+                'per_page' => $this->resource->perPage(),
+                'current_page' => $this->resource->currentPage(),
+                'last_page' => $this->resource->lastPage(),
+            ];
+        }
+
+        return $data;
+    }
+}