Ibis: Adding a sidebar template for blog pages and fallbacks

Adding a sidebar template for blog pages and fallbacks. Mostly because I don't think we've tried this yet.

ibis/block-template-parts/sidebar.html

@@ -0,0 +1,15 @@
+<!-- wp:heading -->
+<h2>Latest Posts</h2>
+<!-- /wp:heading -->
+
+<!-- wp:latest-posts /-->
+
+<!-- wp:heading -->
+<h2>Latest Comments</h2>
+<!-- /wp:heading -->
+
+<!-- wp:latest-comments /-->
+
+<!-- wp:paragraph -->
+<p></p>
+<!-- /wp:paragraph -->

ibis/block-templates/index.html

@@ -19,7 +19,9 @@
 
 <!-- wp:column {"width":33.33} -->
 <div class="wp-block-column" style="flex-basis:33.33%"><!-- wp:paragraph -->
-<p>This will be the sidebar template</p>
+<!-- wp:group {"align":"full","tagName":"header"} -->
+<div class="wp-block-group alignfull"><div class="wp-block-group__inner-container"><!-- wp:template-part {"slug":"sidebar","theme":"ibis","align":"full"} /--></div></div>
+<!-- /wp:group -->
 <!-- /wp:paragraph --></div>
 <!-- /wp:column --></div>
 <!-- /wp:columns -->