add subfolders

db/migrate/20250718121133_add_parent_folder_id_to_template_folders.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddParentFolderIdToTemplateFolders < ActiveRecord::Migration[8.0]
+  def change
+    add_reference :template_folders, :parent_folder, foreign_key: { to_table: :template_folders }, index: true
+  end
+end