fix: make comments clear and detailed

src/main/java/org/model/ElectricCar.java

@@ -30,6 +30,8 @@ public class ElectricCar extends Car implements Chargeable {
     // TODO: Override getEnergyType() → return "Electric"
 
     // TODO: Override showDetails()
+    // Call super.showDetails()
+    // Print battery capacity and charge level
 
     // TODO: Implement charge(double amount)
     // Validate negative