V2 Simulator - Get Rolling Stock In Game

[katycat5e]

• [x] Basic exporter for a car type and 1+ variant
  • [x] Use new scripts in project config
  • [x] Asset bundle build
  • [x] New template prefab
• [x] Basic importer into game
  • [x] Parse config & asset bundles
  • [x] Process & adapt prefabs
  • [x] Add to car/variant lists for spawning
  • [x] Add to cargo handlers