Shared vision during attacks by catapults

[Langbart]

to reproduce

• when the range of siege units, such as stone throwers, is changed, not enough of the building may be visible to see the damage progress, leading to the problem described in #6708

possible solution

• shared vision, see discussion in the forum ​Catapults fire infinitely (18/Jan/23)
  • the attacker sees the building and the attacked person sees the catapult with a small vision range

related feature

• see [19175] for an already included feature with VisionSharing