feat: Update Proxmox extension with various improvements and bug fixes

- Change listStates method to accept nullable integer for limit parameter.
- Modify TechnitiumDns class to return structured error messages on failure.
- Enhance VNC and xterm popup routes with user authorization checks.
- Update backups view to improve loading states and add unique keys for dynamic elements.
- Refactor cloud-init view to ensure proper data binding and improve user experience.
- Add wire:key attributes to various elements in views for better Livewire performance.
- Improve error handling and user feedback in the firewall view.
- Update server overview and statistics views to handle potential null values gracefully.
- Add new migration files to extend database schema with user-set icons and notes for Proxmox nodes.

themes/lucentui/views/layouts/app.blade.php

@@ -269,7 +269,7 @@
 
     <div class="relative z-10 w-full flex flex-grow">
         @if (isset($sidebar) && $sidebar)
-            <x-navigation.sidebar title="$title" />
+            <x-navigation.sidebar :title="$title ?? ''" />
         @endif
         
         <div class="{{ (isset($sidebar) && $sidebar) ? 'md:ml-64 rtl:ml-0 rtl:md:mr-64' : '' }} flex flex-col flex-grow overflow-auto">