Initial plugin setup (v0.0.1)

- Create initial WordPress plugin structure
- Add Prometheus metrics collector with default metrics
- Implement authenticated /metrics endpoint with Bearer token
- Add license management integration
- Create admin settings page under Settings > Metrics
- Set up Gitea CI/CD pipeline for automated releases
- Add extensibility via wp_prometheus_collect_metrics hook

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

composer.json

@@ -0,0 +1,61 @@
+{
+    "name": "magdev/wp-prometheus",
+    "description": "WordPress Prometheus metrics endpoint with extensible hooks for custom metrics",
+    "type": "wordpress-plugin",
+    "license": "GPL-2.0-or-later",
+    "authors": [
+        {
+            "name": "Marco Graetsch",
+            "email": "magdev3.0@gmail.com",
+            "homepage": "https://src.bundespruefstelle.ch/magdev"
+        }
+    ],
+    "homepage": "https://src.bundespruefstelle.ch/magdev/wp-prometheus",
+    "support": {
+        "issues": "https://src.bundespruefstelle.ch/magdev/wp-prometheus/issues"
+    },
+    "repositories": [
+        {
+            "type": "path",
+            "url": "lib/wc-licensed-product-client"
+        }
+    ],
+    "require": {
+        "php": ">=8.3",
+        "magdev/wc-licensed-product-client": "dev-main",
+        "promphp/prometheus_client_php": "^2.10"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^10.0",
+        "squizlabs/php_codesniffer": "^3.7",
+        "wp-coding-standards/wpcs": "^3.0",
+        "phpcompatibility/phpcompatibility-wp": "*"
+    },
+    "autoload": {
+        "psr-4": {
+            "Magdev\\WpPrometheus\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Magdev\\WpPrometheus\\Tests\\": "tests/"
+        }
+    },
+    "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        },
+        "optimize-autoloader": true,
+        "sort-packages": true,
+        "platform": {
+            "php": "8.3.0"
+        }
+    },
+    "scripts": {
+        "phpcs": "phpcs",
+        "phpcbf": "phpcbf",
+        "test": "phpunit"
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
+}