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/Repositories/DnsManager/Domain/DnsDomainRepository.php

@@ -35,7 +35,7 @@ class DnsDomainRepository extends BaseRepository implements DnsDomainRepositoryI
 
         if (isset($data['user_id']) && $data['user_id']) {
             $model = $model->whereHas('users', function ($query) use ($data) {
-                $query->where('users.id', $data['user_id']);
+                $query->where('customers.id', $data['user_id']);
             });
         }