title: How to have a page for listing element of a custom taxonomy from custom post type
body: <p>i want to have a page who list all items (not post), only terms of my taxonomy (Like a page who list categories)</p>
  <p>when i go to mywebsite.test/categories/test , it show items of my taxonomy
  but when i go to mywebsite.test/categories, it show me a 404 error...</p>