Refactor device event handling and improve icon loading in InstalledAppsWidget

- Updated DeviceInfoWidget to include necessary headers for UI components.
- Modified DiskUsageWidget to enable debug mode for gallery usage.
- Enhanced iDescriptor.h by adding new AddType for pairing failures.
- Replaced QLabel with IDLoadingIconLabel in InstalledAppsWidget for better icon handling.
- Implemented asynchronous icon loading in InstalledAppsWidget using a queue.
- Improved event handling in main window to differentiate between connection states.
- Added alreadyExists method in NetworkDeviceCard to handle already connected devices.
- Updated Rust dependencies and added new header for device event subscription.
- Refactored Rust code to improve device pairing logic and event callback handling.

src/devdiskimagehelper.h

@@ -27,7 +27,7 @@
 #include <QPushButton>
 #include <QWidget>
 
-class QProcessIndicator;
+class ZLoadingWidget;
 
 class DevDiskImageHelper : public QDialog
 {
@@ -62,8 +62,7 @@ private:
     const iDescriptorDevice *m_device;
 
     QLabel *m_statusLabel;
-    QProcessIndicator *m_loadingIndicator;
-    QPushButton *m_mountButton;
+    ZLoadingWidget *m_loadingWidget;
     QPushButton *m_retryButton;
     QPushButton *m_cancelButton;