docs: add repository badges and composer metadata

Author: Septiyan Nariyanto

README.md

@@ -1,5 +1,12 @@
 # Safe Staging Guard
 
+[![CI](https://github.com/nariyanto/wp-safe-staging-guard/actions/workflows/ci.yml/badge.svg)](https://github.com/nariyanto/wp-safe-staging-guard/actions/workflows/ci.yml)
+[![Latest Release](https://img.shields.io/github/v/release/nariyanto/wp-safe-staging-guard?label=release)](https://github.com/nariyanto/wp-safe-staging-guard/releases)
+[![Packagist Version](https://img.shields.io/packagist/v/nariyanto/wp-safe-staging-guard?label=packagist)](https://packagist.org/packages/nariyanto/wp-safe-staging-guard)
+[![PHP](https://img.shields.io/badge/PHP-%3E%3D%207.4-777bb4.svg)](https://www.php.net/)
+[![WordPress](https://img.shields.io/badge/WordPress-%3E%3D%206.0-21759b.svg)](https://wordpress.org/)
+[![License](https://img.shields.io/badge/license-GPL--2.0--or--later-blue.svg)](https://www.gnu.org/licenses/gpl-2.0.html)
+
 Prevent staging-site accidents with visible environment labels, noindex controls, and safe email handling.
 
 ## Why

composer.json

@@ -0,0 +1,34 @@
+{
+  "name": "nariyanto/wp-safe-staging-guard",
+  "description": "Prevent WordPress staging-site accidents with visible environment labels, noindex controls, and safe email handling.",
+  "type": "wordpress-plugin",
+  "license": "GPL-2.0-or-later",
+  "homepage": "https://github.com/nariyanto/wp-safe-staging-guard",
+  "support": {
+    "issues": "https://github.com/nariyanto/wp-safe-staging-guard/issues",
+    "source": "https://github.com/nariyanto/wp-safe-staging-guard"
+  },
+  "authors": [
+    {
+      "name": "Septiyan Nariyanto",
+      "homepage": "https://nariyanto.id"
+    }
+  ],
+  "keywords": [
+    "wordpress",
+    "wordpress-plugin",
+    "staging",
+    "noindex",
+    "email-safety",
+    "development"
+  ],
+  "require": {
+    "php": ">=7.4",
+    "composer/installers": "^2.2"
+  },
+  "autoload": {
+    "psr-4": {
+      "Nariyanto\\SafeStagingGuard\\": "src/"
+    }
+  }
+}