Realistic 4x4 Traction System

This script introduces a completely new, realistic 4x4 traction system to the game. Instead of a simple on/off toggle, all-wheel drive is activated and controlled based on real differential physics.

• Four traction modes: Manual, Semi-automatic, Automatic, and Smart (VarioDrive) – each mode is assigned per vehicle based on the real-world transmission type.
• Real slip detection: The system reads actual wheel slip rather than just speed to automatically engage 4x4 when needed.
• Differential lock: Functional per-axle differential lock that acts directly on the vehicle's physics.
• Tire pressure synergy: When combined with the "Variable Tire Pressure" mod, tire pressure is automatically adjusted between field and road mode.
• On-screen HUD: Displays 4x4/2x4 state, traction mode, and differential lock status. Position can be adjusted directly from the General Settings menu.
• Automatic restriction: Only active for tractors, trucks, harvesters, and cars.

Supports major tractor brands out of the box. Singleplayer only. Per-vehicle configuration via the included DriveModeConfig.lua.