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

Repositories/GameItemsRepository.cs

@@ -17,6 +17,11 @@ namespace PetCompanion.Repositories
             return _context.GameItems.Find(id);
         }
 
+        public IEnumerable<GameItem> GetAll()
+        {
+            return _context.GameItems;
+        }
+
         public void Add(GameItem item)
         {
             _context.GameItems.Add(item);