Render paragraph reference field in page.html.twig In page.html.twig I want to show a paragraph reference field which contains a left and right text_field.

The name of the reference field in the node is: field_intro. That field is linked to a paragraph type named: text_left_right

Using below code I can render the paragraphs, but if I add an extra field to the paragraph type, it is not updated. I would like to render all fields, even if I add a new field in the future.

That is not going to happen with this piece of code:

{% for item in node.field_intro %}
  {{ item.entity.field_left.value }}
{% endfor %}


I found a lot of answers for rendering in node.html.twig but not in page.html.twig.

UPDATE after below comments and answer:
It is not recommended to print fields in a page.html.twig page. Better use views or blocks to establish what you need. And if you want to use templates, use node.html.twig.
but if I add an extra field to the paragraph type, it is not updated.
  I would like to render all fields, even if I add a new field in the
  future.


To answer the question, you just need to loop though the paragraph fields. 

{% for item in node.field_intro %}
  {% for paragraph_field in item.entity %}
     {% if 'field_' in paragraph_field %}
       {{ paragraph_field.value }}
     {% endif %}
  {% endfor %}
{% endfor %}