Logistic Storage Statistics

[chris13524]

Similar to how roboports can report logistic network contents and robot statistics. I think there should be another mode where roboports will report storage statistics. This mode would report two numbers: storage capacity and the total items stored.

There is one issue though: the stack sizes of items can differ. This could be solved in two ways: report slot counts instead of item counts or use a default slot size of 100 unless a slot is filled (so if you have 5 empty slots, report a default capacity of 100; decrease capacity to 401 if you put a satellite in there).

I think that reporting slots counts instead of item counts would be better in two ways. First, the capacity would not differ depending on the items in the network. And second, it would allow alerts reporting low storage (if it reported item count, a single iron plate would report a remaining capacity of 99 rather than 0).