What is Flutter plugin development?

Flutter plugin development:\n\n**Plugin types:**\n• Platform plugins - Access native APIs\n• Dart plugins - Pure Dart packages\n• Federated plugins - Multi-platform support\n\n**Create plugin:**\nbash\nflutter create --template=plugin my_plugin\n\n\n**Plugin structure:**\n\nmy_plugin/\n lib/my_plugin.dart # Dart API\n android/ # Android implementation\n ios/ # iOS implementation\n example/ # Example app\n\n\n**Method channel:**\n\n// Dart side\nclass MyPlugin {\n static const MethodChannel _channel = MethodChannel('my_plugin');\n \n static Future getPlatformVersion() async {\n final String version = await _channel.invokeMethod('getPlatformVersion');\n return version;\n }\n}\n\n\n**Android implementation:**\nkotlin\nclass MyPlugin: FlutterPlugin, MethodCallHandler {\n override fun onMethodCall(call: MethodCall, result: Result) {\n when (call.method) {\n \"getPlatformVersion\" -> {\n result.success(\"Android ${android.os.Build.VERSION.RELEASE}\")\n }\n }\n }\n}\n\n\n**Publishing:**\n• Add to pub.dev\n• Follow pub.dev guidelines\n• Include documentation