QDS-11412 Implement built-in QR code reader

This MR brings the following features;

• add: built-in QR code reader based on zxing-cpp library
• chore: bump to Qt 6.6.1 to fix camera access issues (QTBUG-116526)

android/AndroidManifest.xml

@@ -5,7 +5,6 @@
     <!-- %%INSERT_FEATURES -->
     <supports-screens android:anyDensity="true" android:largeScreens="true"
         android:normalScreens="true" android:smallScreens="true" />
-
     <application android:name="org.qtproject.qt.android.bindings.QtApplication"
         android:extractNativeLibs="true" android:hardwareAccelerated="true"
         android:label="Qt UI Viewer" android:requestLegacyExternalStorage="true"