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.

extensions/Servers/Proxmox/database/migrations/2025_12_05_150000_add_user_set_icon_to_ext_proxmox_servers.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('ext_proxmox_servers', function (Blueprint $table) {
+            if (!Schema::hasColumn('ext_proxmox_servers', 'user_set_icon')) {
+                $table->string('user_set_icon', 64)->nullable()->after('password');
+            }
+            if (!Schema::hasColumn('ext_proxmox_servers', 'user_set_icon_color')) {
+                $table->string('user_set_icon_color', 32)->nullable()->after('user_set_icon');
+            }
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('ext_proxmox_servers', function (Blueprint $table) {
+            $table->dropColumn(['user_set_icon', 'user_set_icon_color']);
+        });
+    }
+};

extensions/Servers/Proxmox/database/migrations/2026_02_22_000001_add_notes_to_ext_proxmox_nodes_table.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('ext_proxmox_nodes', function (Blueprint $table) {
+            if (!Schema::hasColumn('ext_proxmox_nodes', 'notes')) {
+                $table->string('notes')->nullable()->after('name');
+            }
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('ext_proxmox_nodes', function (Blueprint $table) {
+            $table->dropColumn('notes');
+        });
+    }
+};