Add a clearer UI for the shipyard and ship cargo

It often just says shipyard full, or unable to unload, without giving clear feedback on what can actually be stored, like the storage warehouses do. Would be great to have some kind of bar/mouse-over that shows "the shipyard can handle this many resources before overfilling" etc.

And allow the Shipyard to be upgraded to increase the storage size.

Add ports to the shipyard so you can pull items out of it and place them into storages