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)

cicd/gitlab-ci.yml

 variables:
   QDS_CI_QT_VERSION:
-    value: "652"
+    value: "661"
     options:
       - "643"
       - "652"
+      - "661"
     description: "Qt version for build"
   QDS_CI_ARTIFACTS_PATH: "${CI_PROJECT_DIR}/artifacts"
   DEBIAN_FRONTEND: non-interactive