MultiFarmStorage - Shared Farms Edition

TEST BUILD

This edition marks the MultiFarmStorage placeable as shared and attempts to
relax the farm-access checks used by the silo/object-storage interaction.

The owner farm remains the owner. This is intended to share access, not to
transfer ownership or merge farm accounts.

IMPORTANT:
- Make a backup of the savegame before testing.
- Install this ZIP on the dedicated server and all clients if the game asks
  for the mod on the client.
- Test first with two farms: Farm A owns the silo, Farm B tries to unload and
  load a bulk material from the same silo.
- Also test pallet/bale access if you use that part of the building.
- If a trigger still says that the silo is not accessible to Farm B, send the
  server log after that attempt. The exact FS25 build can use a different
  permission method, and the wrapper can then be adjusted without changing
  the savegame.
