[Dynamic Zones] Store min and max players on dz (#1355)

This starts some changes that move storage of things from expeditions to
dynamic zone class so other systems can possibly use them. This will also
make it easier to move window packet creation methods to DynamicZone.

For now these will remain on the expeditions table in the database. This
can be re-evaluated once other components are moved and seeing how other
systems may want to handle their player requirements.

world/expedition_state.cpp

@@ -110,6 +110,10 @@ void ExpeditionState::CacheExpeditions(
 			}
 		}
 
+		// stored on expedition in db but on dz in memory cache
+		expedition->GetDynamicZone().SetMinPlayers(entry.min_players);
+		expedition->GetDynamicZone().SetMaxPlayers(entry.max_players);
+
 		expedition->CacheMemberStatuses();
 
 		m_expeditions.emplace_back(std::move(expedition));