Doc: Grouped Qt Quick types into several groups

-created new groups and converted some overviews into group pages
-edited type documentation and added \ingroup
-articles still need title fixes and link fixes

Groups:
qtquick-visual-types
qtquick-item-graphics
qtquick-shaders
qtquick-canvas
qtquick-text
qtquick-text-validator
qtquick-interaction
qtquick-positioners
qtquick-transformations
qtquick-states
qtquick-animation-define
qtquick-animation-properties
qtquick-animation-control
qtquick-animation-modifiers
qtquick-images-sprites
qtquick-images
qtquick-models
qtquick-containers
qtquick-views
qtquick-paths
qtquick-utility

Task: QTBUG-25685

Change-Id: I81d4df3320bf5daad5cabb5e42408013fb24f464
Reviewed-by: Bea Lam <bea.lam@nokia.com>
Reviewed-by: Alan Alpert <alan.alpert@nokia.com>