Move score related QML/C++ classes to Nootka.Music module

src/CMakeLists.txt

src/core/CMakeLists.txt

src/core/score/taddnoteitem.h

src/core/score/tdummychord.h

src/core/score/tmelodypreview.h

src/core/score/tnoteitem.h

src/core/score/tscoreobject.h

src/core/score/tstaffitem.h

src/core/score/tstafflines.h

src/core/tnootkaqml.cpp

src/qml/score/DelControl.qml

src/qml/score/MeterDrawer.qml

src/qml/score/NoteAdd.qml

src/qml/score/NotePrompt.qml

src/qml/score/Score.qml

src/qml/score/ScoreCursor.qml

src/qml/score/Staff.qml