feat(shop): wire product/cart widget zones and extra sidebars

Render shop_product top/sidebar/bottom and cart fluid areas; register
shop home/order sidebar slots for zibll shop layout parity.

templates/pages/page-cart.php

@@ -34,7 +34,10 @@ $address_book = is_array($cart_view['address_book'] ?? null) ? $cart_view['addre
 ?>
 
 <main id="main-content" class="site-main content-shell" tabindex="-1">
-    <?php if (function_exists('aksrt_breadcrumbs')) { aksrt_breadcrumbs(); } ?>
+    <?php if (is_active_sidebar('shop_cart_top_fluid')) : ?>
+    <div class="aksrt-fluid-widget aksrt-fluid-widget--shop"><?php dynamic_sidebar('shop_cart_top_fluid'); ?></div>
+<?php endif; ?>
+<?php if (function_exists('aksrt_breadcrumbs')) { aksrt_breadcrumbs(); } ?>
 
     <div
         class="aksrt-cart-page container"
@@ -283,4 +286,7 @@ $address_book = is_array($cart_view['address_book'] ?? null) ? $cart_view['addre
     </div>
 </main>
 
+<?php if (is_active_sidebar('shop_cart_bottom_fluid')) : ?>
+    <div class="aksrt-fluid-widget aksrt-fluid-widget--shop"><?php dynamic_sidebar('shop_cart_bottom_fluid'); ?></div>
+<?php endif; ?>
 <?php get_footer(); ?>