feat(frontend): replace lazy loading with zibll lazysizes

templates/parts/docs/doc-index-card.php

@@ -24,7 +24,7 @@ $excerpt = wp_trim_words(get_the_excerpt(), 30, '...');
 <a href="<?php the_permalink(); ?>" class="aksrt-doc-index-card">
     <?php if ($thumb) : ?>
         <div class="aksrt-doc-index-card__thumb">
-            <img src="<?php echo esc_url($thumb); ?>" alt=""<?php echo function_exists('aksrt_lazy_loading') ? aksrt_lazy_loading('other') : ' loading="lazy"'; ?>>
+            <img<?php echo aksrt_get_lazy_attr('lazy_other', (string) $thumb); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?> alt="">
         </div>
     <?php else : ?>
         <div class="aksrt-doc-index-card__icon">