Implement version 0.0.1 - Licensed Product type for WooCommerce

Add complete plugin infrastructure for selling software with license keys:

- New "Licensed Product" WooCommerce product type
- License key generation (XXXX-XXXX-XXXX-XXXX format) on order completion
- Domain-based license validation system
- REST API endpoints (validate, status, activate, deactivate)
- Customer My Account "Licenses" page
- Admin license management under WooCommerce > Licenses
- Checkout domain field for licensed products
- Custom database tables for licenses and product versions
- Twig template engine integration
- Full i18n support with German (de_CH) translation

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

composer.json

@@ -0,0 +1,31 @@
+{
+    "name": "magdev/wc-licensed-product",
+    "description": "WooCommerce plugin to sell software products using license keys",
+    "type": "wordpress-plugin",
+    "license": "GPL-2.0-or-later",
+    "authors": [
+        {
+            "name": "Marco Graetsch",
+            "email": "magdev3.0@gmail.com",
+            "homepage": "https://src.bundespruefstelle.ch/magdev"
+        }
+    ],
+    "require": {
+        "php": ">=8.3.0",
+        "twig/twig": "^3.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Jeremias\\WcLicensedProduct\\": "src/"
+        }
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "sort-packages": true,
+        "platform": {
+            "php": "8.3.0"
+        }
+    },
+    "minimum-stability": "stable",
+    "prefer-stable": true
+}