Port ActiveCallBar to Qml

CMakeLists.txt

resources/qml/ImageButton.qml

resources/qml/TimelineView.qml

src/ActiveCallBar.cpp

src/ActiveCallBar.h

src/CallManager.cpp

src/CallManager.h

src/ChatPage.cpp

src/ChatPage.h

src/MainWindow.cpp

src/TextInputWidget.cpp

src/TextInputWidget.h

src/WebRTCSession.cpp

src/WebRTCSession.h

src/timeline/TimelineViewManager.cpp

src/timeline/TimelineViewManager.h