Added a base class for item behaviour

Assets/Scripts/Game/Items/FruitBehaviour.cs

@@ -0,0 +1,12 @@
+using UnityEngine;
+
+namespace Fruitomation.Game.Items
+{
+    public class FruitBehaviour : ItemBehaviour
+    {
+        protected override void OnInitialized()
+        {
+            Body2D.linearVelocity = Random.insideUnitCircle * 2.5f;
+        }
+    }
+}