add two item in mission and create migration for them

database/migrations/2026_06_21_120836_add_item_and_subitems_to_missions_table.php

@@ -0,0 +1,29 @@
+<?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('missions', function (Blueprint $table) {
+            $table->unsignedInteger('item_id')->nullable();
+            $table->unsignedInteger('sub_item_id')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('missions', function (Blueprint $table) {
+            //
+        });
+    }
+};