Add (seeder): new category seeder

database/seeders/NewCategorySeeder.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Models\Category;
+use Illuminate\Database\Seeder;
+
+class NewCategorySeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     */
+    public function run(): void
+    {
+      $node = Category::create(['name' => 'AI', 'short_name' => 'AI']);
+
+      $parent = Category::find(37);
+
+      $node->appendToNode($parent)->save();
+    }
+}