Initial implementation of WooCommerce Composable Products plugin

Implemented custom WooCommerce product type allowing customers to build their own
product bundles by selecting from predefined sets of products.

Features:
- Custom "Composable Product" type with admin interface
- Product selection by category, tag, or SKU
- Configurable selection limits (global and per-product)
- Dual pricing modes: fixed price or sum of selected products
- Modern responsive frontend with Twig templates
- AJAX add-to-cart functionality
- Full internationalization support (.pot file)
- WooCommerce settings integration
- Comprehensive documentation

Technical implementation:
- PHP 8.3+ with PSR-4 autoloading
- Twig 3.0 templating engine via Composer
- Vanilla JavaScript with jQuery for frontend interactions
- WordPress and WooCommerce hooks for seamless integration
- Security: input sanitization, validation, and output escaping
- Translation-ready with text domain 'wc-composable-product'

Documentation:
- README.md: Project overview and features
- INSTALL.md: Installation and usage guide
- IMPLEMENTATION.md: Technical architecture
- CHANGELOG.md: Version history

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

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

composer.json

@@ -0,0 +1,25 @@
+{
+    "name": "magdev/wc-composable-product",
+    "description": "WooCommerce plugin for user composable products",
+    "type": "wordpress-plugin",
+    "license": "GPL-3.0-or-later",
+    "authors": [
+        {
+            "name": "Marco Graetsch",
+            "email": "marco@example.com"
+        }
+    ],
+    "require": {
+        "php": ">=8.3",
+        "twig/twig": "^3.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "WC_Composable_Product\\": "includes/"
+        }
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "sort-packages": true
+    }
+}