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

assets/slike/hisne_zivali/README.md

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+# 🐄 HIŠNE ŽIVALI (Farm Animals)
+
+Domestic farm animals and pets.
+
+## Categories
+
+### **Livestock**:
+- Cow (milk, meat)
+- Pig (meat)
+- Sheep (wool, meat)
+- Goat (milk, cheese)
+- Chicken (eggs, meat)
+- Duck (eggs, meat)
+- Turkey
+- Rabbit
+
+### **Pets/Companions**:
+- Dog (farm guard, companion)
+- Cat (pest control)
+- Horse (transportation, riding)
+
+### **Special**:
+- Llama
+- Alpaca
+- Donkey
+- Mule
+
+### **Animal Products**:
+- Milk
+- Eggs
+- Wool
+- Feathers
+- Leather
+
+---
+
+**Asset type**: Sprites + Items  
+**Usage**: Farming gameplay, animal husbandry, resources  
+**Format**: PNG (64x64 animals, 32x32 products)

assets/slike/rudniki/README.md

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+# 🪨 RUDNIKI (Mining Resources)
+
+Mining resources, ores, gems, and minerals.
+
+## Categories
+
+### **Ores**:
+- Copper ore
+- Iron ore
+- Gold ore
+- Silver ore
+- Coal
+
+### **Gems**:
+- Diamond
+- Ruby
+- Emerald
+- Sapphire
+- Amethyst
+
+### **Special Minerals**:
+- Crystal
+- Obsidian
+- Uranium
+- Titanium
+
+### **Processed**:
+- Ingots (copper, iron, gold, etc.)
+- Refined gems
+- Alloys
+
+---
+
+**Asset type**: Items  
+**Usage**: Mining gameplay, crafting materials  
+**Format**: PNG (32x32 items, 64x64 ore deposits)

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)