feat: Bootstrap 5 block renderer, widget cards, and sidebar post layout (v1.1.0)

Add BlockRenderer class injecting Bootstrap classes into 8 core block types
(table, button, buttons, image, search, quote, pullquote, list) via per-block
render_block filters using WP_HTML_Tag_Processor.

Add WidgetRenderer class wrapping sidebar widgets in Bootstrap card components
with h4 heading hierarchy via dynamic_sidebar_params and widget_block_content
filters.

Add widget SCSS stylesheet for list styling, search input-group, tag cloud
pills, and card-flush list positioning.

Add single-sidebar.html.twig as the default post template with two-column
Bootstrap layout (col-lg-8 content, col-lg-4 sidebar). Full-width available
via template selection.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

inc/Template/ContextBuilder.php

@@ -70,14 +70,19 @@ class ContextBuilder
             $context['sidebar'] = $this->getSidebarData();
         }
 
-        // Sidebar data for pages/posts using the "Page with Sidebar" template.
-        if (is_page() || is_singular('post')) {
+        // Sidebar data for pages using the "Page with Sidebar" template.
+        if (is_page()) {
             $slug = get_page_template_slug();
             if ($slug === 'page-sidebar') {
                 $context['sidebar'] = $this->getSidebarData();
             }
         }
 
+        // Posts always get sidebar data (sidebar is the default layout).
+        if (is_singular('post')) {
+            $context['sidebar'] = $this->getSidebarData();
+        }
+
         return $context;
     }
 

inc/Template/TemplateController.php

@@ -83,7 +83,11 @@ class TemplateController
         }
 
         if (is_singular('post')) {
-            return 'pages/single.html.twig';
+            $slug = get_page_template_slug();
+            return match ($slug) {
+                'page-full-width' => 'pages/single.html.twig',
+                default           => 'pages/single-sidebar.html.twig',
+            };
         }
 
         if (is_page()) {