v1.2.0 - Fix product selection, cart pricing, admin tabs + CI/CD

Fix three critical bugs that persisted through v1.1.11-v1.1.14:

- Product selection always empty: meta_query checked _product_type in
  postmeta, but WooCommerce uses the product_type taxonomy. Replaced
  with correct tax_query using NOT IN operator.
- Cart price always 0.00: composable_price_calculated flag persisted
  in session, preventing recalculation on page loads. Removed flag;
  static variable already handles per-request dedup.
- Admin tabs both visible on load: JS now triggers WooCommerce native
  tab click instead of manually toggling panel visibility.

Add Gitea CI/CD release workflow triggered on v* tags.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

wc-composable-product.php

@@ -4,7 +4,7 @@
  * Plugin Name: WooCommerce Composable Products
  * Plugin URI: https://src.bundespruefstelle.ch/magdev/wc-composable-product
  * Description: Create composable products where customers select a limited number of items from a configurable set
- * Version: 1.1.14
+ * Version: 1.2.0
  * Author: Marco Graetsch
  * Author URI: https://src.bundespruefstelle.ch/magdev
  * License: GPL v3 or later
@@ -20,7 +20,7 @@
 defined('ABSPATH') || exit;
 
 // Define plugin constants
-define('WC_COMPOSABLE_PRODUCT_VERSION', '1.1.14');
+define('WC_COMPOSABLE_PRODUCT_VERSION', '1.2.0');
 define('WC_COMPOSABLE_PRODUCT_FILE', __FILE__);
 define('WC_COMPOSABLE_PRODUCT_PATH', plugin_dir_path(__FILE__));
 define('WC_COMPOSABLE_PRODUCT_URL', plugin_dir_url(__FILE__));