Use Drupal breadcrumb markup

[nstriedinger]

Use Drupal breadcrumb as an include in our base install. This can be static.

<nav role="navigation" aria-labelledby="system-breadcrumb">
    <h2 class="visually-hidden">{{ 'Breadcrumb'|t }}</h2>
    <ol>
    {% for item in breadcrumb %}
        {% if item.url %}
          <a href="{{ item.url }}">{{ item.text }}</a>
        {% else %}
          {{ item.text }}
        {% endif %}
    {% endfor %}
    </ol>
  </nav>