Core/Transports: ported transport refactoring

* this implements full support for stoppable transports as well as serverside transport position tracking
* fixed several vehicle related issues
* fixed gameobject passengers not being displayed as transport passengers
* pets, dynamic objects and other summons are not added as transport passengers and will now properly be displayed
Todo:
- Deeprun Tram visual issues needs to be resolved
- Lady Deathwhisper's elevator needs some additional research

src/server/scripts/Commands/cs_debug.cpp

@@ -1425,7 +1425,7 @@ public:
 
     static bool HandleDebugTransportCommand(ChatHandler* handler, char const* args)
     {
-        Transport* transport = handler->GetSession()->GetPlayer()->GetTransport();
+        MapTransport* transport = handler->GetSession()->GetPlayer()->GetMapTransport();
         if (!transport)
             return false;