Move all QML components related to score into 'score' directory

src/libs/core/score/tnoteitem.cpp

src/nootka.qrc

src/qml/MainScore.qml

src/qml/instruments/Instrument.qml

src/qml/level/MelodyPage.qml

src/qml/level/RangePage.qml

src/qml/score/Clef.qml

src/qml/score/ClefDrawer.qml

src/qml/score/ControlBase.qml

src/qml/score/Meter.qml

src/qml/score/MeterDrawer.qml

src/qml/score/NoteCursor.qml

src/qml/score/Score.qml

src/qml/score/Staff.qml

src/qml/settings/InstrumentPage.qml

src/qml/wizard/WizardClef.qml