Clean Up & New Components!

In v1.3.0 the slots class was added, since then I have used this to build a full inventory system so the code has been updated now with what I know works and is needed, along with this includes a new SlotPopup compenent to handle adding / removing item displays.

Has had a nice new theme all throughout, and 2 more new components added detailed below :)

New Components

Slot Popup:

Was required when creating an inventory to have -1 and +1 item displays on interactions, so now it exists.
Could be used standalone too, however pairs perfectly with slots if building an inventory.