Sidebar (page list) as Gutenberg block

[brylie]

Problem

Our default layout currently displays a sidebar. The sidebar renders a page list where the pages are children of the parent:

creativecommons-base/page.php

Lines 18 to 36 in f49ec2a

	<aside class="sidebar">
	<?php
	$parent = CC_Site::get_parent_page();
	echo '<nav class="side-navigation padding-vertical-big">';
	echo '<ul class="list-pages">';
	wp_list_pages(
	array(
	'child_of' => $parent,
	'show_date' => '',
	'depth' => 3,
	'title_li' => '',
	)
	);
	echo '</ul>';
	echo '</nav>';
	get_sidebar();
	?>
	</aside>

However, having the sidebar doesn't allow Gutenberg blocks to display full-width.

Description

Determine how best to handle the sidebar menu, such as

• moving it to a custom Gutenberg widget
• using the default Gutenberg page list block (which doesn't allow specifying a root page)
• making the default template have no sidebar and creating a "page with sidebar" theme

Related resources

• Upstream issue Allow specifying "root" page in Page List block WordPress/gutenberg#33883