BHV-11870: Support moon.Item Icon Overlay

Adding moon.ItemOverlay kind to support common item pattern.
 - Item is composed of label and icons
 - Label should have marquee
 - Icons can be on the left/right side of label
 - Icons can be shown on focus and auto hide

We can avoid use of fittable inside of item by using this new kind.

DCO-1.1-Signed-Off-By: Kunmyon Choi kunmyon.choi@lge.com