Add number of total docking pads at station to lobby

[impaktor]

I've been playing with the lobby (motivated by comments in other PR), trying to see how much of that code I can muster. So in experimenting, I added one more info sentence.

(I imagine these Lobby-sentences, sort of how the pilot annonuces the weather when you land at a new airport)

I'm doing this as WIP, because maybe wording can be better (suggestions?), or I find other stuff to add to it.

Possibly we'd also like to add information about how many ships are currently
docked, as this only shows the total capacity.

[WKFO]

Didn't look at the code, but if possible, we could also separate medium and small docking pads, like "...total of 4 medium and 12 small docking pads." or something.

[impaktor]

Yeah, that would be better, but that information isn't as easily accessible. @fluffyfreak would know for sure where to get that info. Not sure it's even exposed on Lua side, but would have to do some digging.

(I'm also thinking police station would say how many police ships there are, and how many are docked).

[sturnclaw]

I'm not 100% sure the game even makes the distinction between pad sizes. I might be wrong, but AFAIK the landing and station code doesn't really care, it just knows "pad" and "not pad".

[fluffyfreak]

Internally the pad sizes matter, you can't be allocated a pad smaller than your ship for example. I don't know if that's exposed anywhere though.