feat: more information and reaction effects for item slots menu

[boscohyun]

Screenshot

Idea

• User can check whether it is equipped or not int the equipment item slot.
• When sorting the inventory slots, set an equipped equipment item slots in the front.
• Activates the selection effect when the user selects an equipment item slot in the inventory. At this time, the equipped item slot is also activated. It also works in reverse.
• When the user hovers the mouse over the equipped item slot, a tooltip for the item displayed.