v1.0.0 - Release: widget area, documentation refresh

- Register sidebar widget area via register_sidebar()
- Render WordPress widgets in Twig sidebar with fallback to built-in content
- Update README.md with accurate feature counts and descriptions
- Update translation files with widget area strings
- Bump version to 1.0.0

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

functions.php

@@ -44,6 +44,26 @@ if ( ! function_exists( 'wp_bootstrap_setup' ) ) :
 endif;
 add_action( 'after_setup_theme', 'wp_bootstrap_setup' );
 
+/**
+ * Register widget areas.
+ *
+ * @since 1.0.0
+ */
+if ( ! function_exists( 'wp_bootstrap_register_sidebars' ) ) :
+    function wp_bootstrap_register_sidebars() {
+        register_sidebar( array(
+            'name'          => __( 'Sidebar', 'wp-bootstrap' ),
+            'id'            => 'primary-sidebar',
+            'description'   => __( 'Add widgets here to appear in the sidebar.', 'wp-bootstrap' ),
+            'before_widget' => '<div id="%1$s" class="widget mb-4 %2$s">',
+            'after_widget'  => '</div>',
+            'before_title'  => '<h3 class="sidebar-heading h6 text-uppercase fw-semibold">',
+            'after_title'   => '</h3>',
+        ) );
+    }
+endif;
+add_action( 'widgets_init', 'wp_bootstrap_register_sidebars' );
+
 /**
  * Enqueue theme scripts and styles.
  */