refactor(dns-validation): rename DNS validation functions for consistency and clarity, and remove unused code

app/Livewire/Settings/Index.php

@@ -115,7 +115,7 @@ class Index extends Component
             $this->validate();
 
             if ($this->settings->is_dns_validation_enabled && $this->fqdn) {
-                if (! validate_dns_entry($this->fqdn, $this->server)) {
+                if (! validateDNSEntry($this->fqdn, $this->server)) {
                     $this->dispatch('error', "Validating DNS failed.<br><br>Make sure you have added the DNS records correctly.<br><br>{$this->fqdn}->{$this->server->ip}<br><br>Check this <a target='_blank' class='underline dark:text-white' href='https://coolify.io/docs/knowledge-base/dns-configuration'>documentation</a> for further help.");
                     $error_show = true;
                 }