[Arcs] [FAQ ready] Gate Port, Gate Station, Cloud City max 1 per system limit

[turmoilbyrd]

Can perhaps add a FAQ that's like:

Q: It says "max 1 per system", but can multiple players each own one city in the system? A: No, it is not "max 1 per system per player"

• [ ] Gate Port
• [ ] Gate Station
• [ ] Cloud City