feat(navigation): hard-switch to Zibll navigation and Font Awesome 5

templates/parts/docs/doc-chapter-nav.php

@@ -47,7 +47,7 @@ if (!$prev_page && !$next_page) return;
     <?php if ($prev_page) : ?>
         <a href="<?php echo esc_url(get_permalink($prev_page->ID)); ?>" class="aksrt-doc-chapter-nav__prev">
             <span class="aksrt-doc-chapter-nav__label">
-                <i class="fas fa-arrow-left"></i>
+                <i class="fa fas fa-arrow-left"></i>
                 <?php esc_html_e('上一篇', 'aksrt'); ?>
             </span>
             <span class="aksrt-doc-chapter-nav__title"><?php echo esc_html($prev_page->post_title); ?></span>
@@ -60,7 +60,7 @@ if (!$prev_page && !$next_page) return;
         <a href="<?php echo esc_url(get_permalink($next_page->ID)); ?>" class="aksrt-doc-chapter-nav__next">
             <span class="aksrt-doc-chapter-nav__label">
                 <?php esc_html_e('下一篇', 'aksrt'); ?>
-                <i class="fas fa-arrow-right"></i>
+                <i class="fa fas fa-arrow-right"></i>
             </span>
             <span class="aksrt-doc-chapter-nav__title"><?php echo esc_html($next_page->post_title); ?></span>
         </a>