move carouselview to standalone c++ component, fix crash due to memory leak in wallpaper object creation

Modules/Launcher/Items/WallpaperTile.qml

@@ -14,8 +14,6 @@ Item {
 	required property real tileWidth
 	required property PersistentProperties visibilities
 
-	// Emitted on click: caller decides whether that means "activate" (if
-	// already current) or "bring to center" (if not) - see CarouselView.
 	signal requestActivate
 
 	implicitHeight: tileHeight + Tokens.padding.large * 2
@@ -31,13 +29,6 @@ Item {
 		radius: Tokens.rounding.small
 		y: Tokens.padding.large
 
-		Behavior on implicitWidth {
-			enabled: !root.visibilities.launcher // avoid fighting drag-driven updates
-
-			Anim {
-			}
-		}
-
 		MaterialIcon {
 			anchors.centerIn: parent
 			color: Colors.tPalette.m3outline