add event 'onPlayerRequestMods', restructure modloading

now every player has their own list of allowed client mods, this can be modified by lua upon joining and is later used as a whitelist to ensure only those files can be sent to each client

include/Client.h

@@ -10,6 +10,7 @@
 #include "BoostAliases.h"
 #include "Common.h"
 #include "Compat.h"
+#include "TResourceManager.h"
 #include "VehicleData.h"
 
 class TServer;
@@ -103,6 +104,8 @@ public:
 
     TimeType::time_point ConnectionTime {};
 
+    ModMap AllowedMods;
+
 private:
     void InsertVehicle(int ID, const std::string& Data);