feat(validators): contest views validator

apps/contests/views.py

@@ -25,17 +25,15 @@ def get_queryset(self) -> QuerySet[Contest]:
             start_time__gte=timezone.now()
         ).order_by("start_time")[:5]
         if not queryset.exists():
-            raise ValidationError("Não há concursos futuros disponíveis.")
+            raise ValidationError("There are no future contests available.")
         return queryset
 
     def get_context_data(self, **kwargs: Any) -> dict[str, Any]:
         ctx = super().get_context_data(**kwargs)
 
         valid_statuses = (ContestStatus.PENDING, ContestStatus.RUNNING)
         if not all(status in ContestStatus for status in valid_statuses):
-            raise ValidationError(
-                "Defina pelo menos dois estados de concurso válidos."
-            )
+            raise ValidationError("Define at least two valid contest states.")
 
         ctx["valid_statuses"] = valid_statuses