Chests

To create a new chest:

1. Create a Chest Block.
2. Create and place a Chest Block Entity on same coordinates.

Then, on interaction:

1. On UseItem..
2. Send ContainerOpenPacket.
3. Send ContainerSetContentPacket.
4. Send TileEntityPackage.

When content change in the chest:

1. Handle ContainerSetSlot for chest
2. Handle ContainerSetSlot for player

When done:

1. Handle ContainerClose for chest.