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

Controllers/PetController.cs

@@ -69,7 +69,7 @@ namespace PetCompanion.Controllers
         {
             try
             {
-                var updatedPet = petService.UpdatePetResources(petId, userId.ToString());
+                var updatedPet = petService.CollectPetGathered(petId, userId.ToString());
                 return Ok(updatedPet);
             }
             catch (Exception ex)