Add action gathering functionality: implement ActionGathered model and repository, update Pet model and services, and enhance GameItemsRepository with item retrieval methods.

Services/GameItemService.cs

@@ -35,6 +35,14 @@ namespace PetCompanion.Services
             }
         }
 
+        public GameItem GetRandomItem()
+        {
+            var items = gameItemsRepository.GetAll();
+            var random = new Random();
+            var index = random.Next(items.Count());
+            return items.ElementAt(index);
+        }
+
         public void ApplyItemEffect(Pet pet, GameItem item)
         {
             var effects = item.Effect.Split(';');