Add migration file that add title, description, visual_url, locale to entries
user
```ruby
class AddVisualToEntries < ActiveRecord::Migration
  def change
    add_column :entries, :title      , :string
    add_column :entries, :description, :string
    add_column :entries, :visual_url , :string
    add_column :entries, :locale     , :string
  end
end
```
assistant