Adding `Equipment` Package

General
* `AnimationSync` will now reset the current clip when child animators
in order to sync them on reload
* Adding an example `Equipment` component to `Actor`
* `DraggedItem` no longer drags an `InventoryItem` but instead a
`DraggableItem` that `InventoryItem` and the new `EquipmentItem` inherit
from

Equipment
* `Equipment` package has been created that stores `EquipmentItem`'s in
slots by `EquipmentType` key
* Also created a GUI and associated handlers to allow equipping and
unequipping of items
* Creating two new items that can be equipped: a `Red Helm` and a `Red
Chest`. Both items can be found in scene, and picked up with `P` like
other items
* GUI for equipment can be opened with `E`