implement ssh connection

- Updated AppWidget to utilize QStackedWidget for better UI management, including loading and error states.
- Removed unnecessary includes and improved the organization of private methods in AppWidget.
- Enhanced DevDiskImagesWidget UI by adding a settings button and improving layout with shadows.
- Refactored DeviceInfoWidget to use QGroupBox for better visual grouping of device information.
- Replaced QProcess with libssh for SSH connections in JailbrokenWidget, improving reliability and performance.
- Added a timer to check SSH data and handle input/output more effectively.
- Improved SettingsManager to manage settings dialog display and lifecycle.
- Refactored SettingsWidget to be a QDialog for better user experience and removed unnecessary buttons.
- Adjusted layout margins across various widgets for a cleaner UI.

src/settingsmanager.cpp

@@ -1,4 +1,5 @@
 #include "settingsmanager.h"
+#include "settingswidget.h"
 #include <QDebug>
 #include <QSettings>
 
@@ -10,6 +11,23 @@ SettingsManager *SettingsManager::sharedInstance()
     return &instance;
 }
 
+void SettingsManager::showSettingsDialog()
+{
+    if (m_dialog) {
+        m_dialog->raise();
+        m_dialog->activateWindow();
+        return;
+    }
+
+    m_dialog = new SettingsWidget();
+    m_dialog->setWindowTitle("Settings - iDescriptor");
+    m_dialog->setModal(true);
+    m_dialog->setAttribute(Qt::WA_DeleteOnClose);
+    connect(m_dialog, &QObject::destroyed, [this]() { m_dialog = nullptr; });
+
+    m_dialog->show();
+}
+
 SettingsManager::SettingsManager(QObject *parent) : QObject{parent}
 {
     m_settings = new QSettings(this);