ifc4x3 support for adding IfcQuantityCount #4776

In IFC4X3 IfcQuantityCount is now more strict and requires only interger values.
Error for a reference:
TypeError: attribute 'CountValue' for entity 'IFC4X3.IfcQuantityCount' is expecting value of type 'INT', got 'float'.

src/ifc5d/ifc5d/csv2ifc.py

@@ -185,7 +185,7 @@ class Csv2Ifc:
                 "cost.add_cost_item_quantity", self.file, cost_item=cost_item["ifc"], ifc_class=quantity_class
             )
             # 3 IfcPhysicalSimpleQuantity Value
-            quantity[3] = cost_item["Quantity"]
+            quantity[3] = int(cost_item["Quantity"]) if quantity_class == "IfcQuantityCount" else cost_item["Quantity"]
             if prop_name:
                 quantity.Name = prop_name