feat: add state management for delete confirmation modal in Proxmox Firewall component to support user interactions during rule deletion

extensions/Servers/Proxmox/Livewire/Firewall.php

@@ -21,6 +21,8 @@ class Firewall extends Component
     public array $adapterFirewallStates = [];
     public array $firewallLogs = [];
     public int $logLimit = 100;
+    public bool $showDeleteModal = false;
+    public ?int $deletingRulePos = null;
 
     // Rule creation/editing
     public ?int $editingRulePos = null;