Put list page back to a view

See: https://www.drupal.org/project/project_wiki/issues/3382575#comment-15212826 📌 Review and adjust the theming of the project wiki list / project wiki entry Needs review

Thx @thomas.frobieter! Correct. This can't be a view and is by design, as we need to handle all kind of plugin contents, not only SQL'able one's. :)