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/DomainNSResource.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Http\Resources\Api\Service;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class DomainNSResource extends JsonResource
+{
+    /**
+     * Transform the resource into an array.
+     *
+     * @return array<string, mixed>
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            'id' => $this->id,
+            'dns_manager_domain_id' => $this->dns_manager_domain_id,
+            'name' => $this->name,
+            'type' => $this->type,
+            'type_valid' => $this->type_valid,
+            'priority' => $this->priority,
+            'weight' => $this->weight,
+            'port' => $this->port,
+            'service_name' => $this->service_name,
+            'protocol' => $this->protocol,
+            'value' => $this->value,
+            'ttl' => isset($this->ttl) ? (int) $this->ttl : null,
+            'plesk_id' => $this->plesk_id,
+            'created_at' => optional($this->created_at)->toISOString(),
+            'updated_at' => optional($this->updated_at)->toISOString(),
+        ];
+    }
+}