Wheel slip

Wheel slip creates cultivator texture on field soil
- Slip threshold decreases when the ground is wet (more damage in the rain)
- Heavy vehicles cause damage even with less slip
- Differential and all-wheel lock reduce the slip effect
- Compatible with FS25_VariableTirePressure: low tire pressure = less damage, high pressure = more damage
- HUD display shows the current maximum wheel slip next to the speedometer (in progress)
- Settings: HUD on/off, color coding, position (in game settings menu)
-I'm currently still testing it so it's a beta version