Make category tree items span full parent width (v0.1.9)

Move <a> elements to be direct children of the list-group so they
naturally fill the full offcanvas/sidebar width. Chevron toggle moved
inside the link with click interception to prevent navigation.

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: 0.1.8
+Version: 0.1.9
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 Template: wp-bootstrap