Squashed 'ext/Log4Qt/' content from commit d25f9ae

git-subtree-dir: ext/Log4Qt
git-subtree-split: d25f9ae2e058e7dadf16382bf854747435605c92
Merge commit '83a08eef2252667cbf921b83296305bcbe276590' as 'ext/Log4Qt'
Added log4qt library to build
Merge branch 'feature/log4qt-repo' into develop
Log something
Runs on device, passes harbour validation
demo classes, initing logging in the separate method
Deployable code
Logging initialization to app side
First cpp test working
Removed wrong duplicates
Multiple cpp test cases in one project
Renamed everything for qml imports and added some cpp obj to qml
Some cpp objects manipulation from qml
Intercept qml console messages
Logger to QML
QML objects using log4qt can be used in tests
logging to journalctl
log to file as well
use app's name for path