Tonar Pack V1.57

Adds the Tonar Pack to ETS2 1.57 with four semi-trailers (grain, curtain-sided, refrigerated, and container), updated with a new cargo system and full compatibility.

Grain Truck:
1 Body;
2 Chassis;
Custom Cargo;
No Tuning.

Curtain-sided Trailer:
2 Bodies;
6 Chassis;
1 Leather;
Tuning.

Refrigerated Trailer:
1 Body;
1 Chassis;
1 Leather;
Tuning.

Container Truck:
3 Chassis;
Containers from SCS;
Can be painted;
Tuning.
In the new version:
Crash fixed;
File conversion;
New cargo system;
Tested on version 1.57.

Authors: Oleg Strukov, Nikola Trucks