parent_id
is_active
order

Schema::create('categories', function (Blueprint $table) {
    $table->unsignedInteger('id')->autoIncrement();
    $table->string('title');
    $table->string('slug');
    $table->unsignedInteger('parent_id')->nullable();
    $table->boolean('is_active')->default(true);
    $table->tinyInteger('order')->default(0);
});

/app/Providers/NovaServiceProvider.php
...
use Day4\TreeView\TreeView;
    ...
    public function tools()
    {
        return [
            ...
            new TreeView([
                ['Categories', 'categories']
            ])
        ];
    }