🏗️ Added 3 new asset categories: rudniki (mining), vozila (vehicles), hisne_zivali (farm animals)

assets/slike/vozila/README.md

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+# 🚗 VOZILA (Vehicles)
+
+Transportation vehicles and farm machinery.
+
+## Categories
+
+### **Farm Vehicles**:
+- Tractor
+- Harvester
+- Plow
+- Seed drill
+- Sprayer
+
+### **Transportation**:
+- Pickup truck
+- ATV/Quad
+- Motorcycle
+- Bicycle
+- Horse cart
+
+### **Special**:
+- Drone
+- Helicopter (late game)
+- Tank (military base)
+- Boat (water zones)
+
+### **Mining Equipment**:
+- Mining cart
+- Drill vehicle
+- Excavator
+
+---
+
+**Asset type**: Sprites  
+**Usage**: Transportation, farming automation  
+**Format**: PNG (64x64 for small, 128x128 for large vehicles)