Create wifi backend abstraction

internal/wifi/factory.go

@@ -0,0 +1,21 @@
+package wifi
+
+import (
+	"fmt"
+
+	"github.com/nemunaire/repeater/internal/wifi/backend"
+	"github.com/nemunaire/repeater/internal/wifi/iwd"
+)
+
+// createBackend creates the appropriate WiFi backend based on the backend name
+func createBackend(backendName string) (backend.WiFiBackend, error) {
+	switch backendName {
+	case "iwd":
+		return iwd.NewIWDBackend(), nil
+	case "wpasupplicant":
+		// TODO: Implement wpa_supplicant backend
+		return nil, fmt.Errorf("wpa_supplicant backend not yet implemented")
+	default:
+		return nil, fmt.Errorf("invalid wifi backend: %s (must be 'iwd' or 'wpasupplicant')", backendName)
+	}
+}