feat: implement server tags management with Proxmox-style color generation and syncing

extensions/Servers/Proxmox/database/migrations/2025_12_18_000000_add_tags_to_ext_proxmox_servers.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_servers', function (Blueprint $table) {
+            // Store tags as JSON array with format: [{"text": "tag1", "color": "#ff0000"}, ...]
+            // Maximum 3 tags per server
+            $table->json('tags')->nullable()->after('user_set_icon_prefix');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('ext_proxmox_servers', function (Blueprint $table) {
+            $table->dropColumn('tags');
+        });
+    }
+};