Initial Fluid Integration (#3510)

* Added Fluid Storage Cells

* Added Fluid Import Bus

* Added Fluid Export Bus

* Added Fluid Storage Bus

* Added Fluid Terminal.
While holding a item with the FLUID_HANDLER_ITEM_CAPABILITY, such as a tank
Left click on a fluid to extract the fluid
Right click to insert the fluid

src/main/java/appeng/helpers/InventoryAction.java

@@ -32,6 +32,10 @@ public enum InventoryAction
 	CRAFT_ITEM,
 	CRAFT_SHIFT,
 
+	// fluid term
+	FILL_ITEM,
+	EMPTY_ITEM,
+
 	// extra...
 	MOVE_REGION,
 	PICKUP_SINGLE,