v0.2.0 - Design Editor: templates, patterns, header/footer variations

Full Design Editor compatibility with custom block categories, page templates,
header/footer variations, and navigation styles. Both FSE (admin) and Twig
(frontend) sides kept in sync.

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

patterns/layout-full-width-section.php

@@ -0,0 +1,20 @@
+<?php
+/**
+ * Title: Full Width Section
+ * Slug: wp-bootstrap/layout-full-width-section
+ * Categories: wp-bootstrap-layout, banner
+ * Description: A full-width section with a primary background color, centered white heading and paragraph.
+ *
+ * @package WPBootstrap
+ * @since 0.2.0
+ */
+?>
+<!-- wp:group {"align":"full","style":{"spacing":{"padding":{"top":"var:preset|spacing|80","bottom":"var:preset|spacing|80"}}},"backgroundColor":"primary","textColor":"base","layout":{"type":"constrained"}} -->
+<div class="wp-block-group alignfull has-base-color has-primary-background-color has-text-color has-background" style="padding-top:var(--wp--preset--spacing--80);padding-bottom:var(--wp--preset--spacing--80)"><!-- wp:heading {"textAlign":"center","fontSize":"xx-large"} -->
+<h2 class="wp-block-heading has-text-align-center has-xx-large-font-size"><?php esc_html_e( 'Full Width Section Heading', 'wp-bootstrap' ); ?></h2>
+<!-- /wp:heading -->
+
+<!-- wp:paragraph {"align":"center","fontSize":"large"} -->
+<p class="has-text-align-center has-large-font-size"><?php esc_html_e( 'This full-width section stands out with a colored background. Use it to highlight important content, announcements, or calls to action.', 'wp-bootstrap' ); ?></p>
+<!-- /wp:paragraph --></div>
+<!-- /wp:group -->