Restyle category tree to idiomatic Bootstrap list-group pattern (v0.1.8)

Switch from custom link classes to Bootstrap's native list-group-item-action
pattern. Replace bold primary-colored active background with subtle tertiary
background, left accent border, and semibold text.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

style.css

@@ -7,7 +7,7 @@ Description: A Bootstrap 5 child theme for WP Bootstrap that overrides all WooCo
 Requires at least: 6.7
 Tested up to: 6.7
 Requires PHP: 8.3
-Version: 0.1.7
+Version: 0.1.8
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 Template: wp-bootstrap