various enhancements

- add helper function declarations to iDescriptor.h
- remove unnessery mountDevImage
- single instance lock for devdiskimages (may be removed in future)
-  implement  safe_afc_read_directory to make sure client is long lived ( for now ony for  afc_read_directory needs to be wrapped)
- remove some cleanup code for testing (init_device.cpp)
- clean leave label for mount_dev_image.cpp

src/appcontext.cpp

@@ -106,6 +106,7 @@ void AppContext::addDevice(QString udid, idevice_connection_type conn_type,
             .conn_type = conn_type,
             .device = initResult.device,
             .deviceInfo = initResult.deviceInfo,
+            .afcClient = initResult.afcClient,
         };
         m_devices[device->udid] = device;
         if (addType == AddType::Regular)
@@ -178,6 +179,11 @@ QList<iDescriptorDevice *> AppContext::getAllDevices()
     return m_devices.values();
 }
 
+QList<RecoveryDeviceInfo *> AppContext::getAllRecoveryDevices()
+{
+    return m_recoveryDevices.values();
+}
+
 // Returns whether there are any devices connected (regular or recovery)
 bool AppContext::noDevicesConnected()
 {