Doc: add typical QML Profiler use cases
Doc: add typical QML Profiler use cases

Change-Id: I81bd8eface83f4b505c0ff30dfcfc74882001f3a
Reviewed-by: Ulf Hermann <e18762205ac3385fdfec64f687142c888dc97458@theqtcompany.com>

xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,Distrotech/qtcreator,danimo/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,xianian/qt-creator,xianian/qt-creator,danimo/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,danimo/qt-creator,Distrotech/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,Distrotech/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,xianian/qt-creator,Distrotech/qtcreator,xianian/qt-creator