Release version 1.1.15 - Fix duplicate settings page

Fixed settings page appearing twice in WooCommerce settings due to double instantiation of WC_TPP_Settings class.

**Issue:**
- Settings page rendered twice on same page
- WC_TPP_Settings class instantiated twice: once automatically in settings file, once via admin class include

**Fix:**
- Removed conditional wrapper `if (class_exists('WC_TPP_Settings'))` from settings return statement
- Settings class now only instantiated when admin class includes the file via `return new WC_TPP_Settings();`
- Restored v1.1.2 pattern for settings file

**Files Modified:**
- includes/class-wc-tpp-settings.php (simplified return statement)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "magdev/wc-tier-package-prices",
     "description": "WooCommerce plugin for tier pricing and package prices with Twig templates",
-    "version": "1.1.14",
+    "version": "1.1.15",
     "type": "wordpress-plugin",
     "license": "GPL-2.0-or-later",
     "authors": [