Add .ttl + Well Known Text geometry serializer

src/ifcopenshell-python/ifcopenshell/geom/main.py

@@ -570,3 +570,13 @@ class serializers:
         hdf5 = ifcopenshell_wrapper.HdfSerializer
     except:
         pass
+
+    # ttl is always available since it doesn't depend on any C++ libraries,
+    # just people might be using an outdated binary
+    if hasattr(ifcopenshell_wrapper, 'TtlWktSerializer'):
+        @staticmethod
+        def ttl(
+            out_filename: Union[str, serializers.buffer], geometry_settings: settings, settings: serializer_settings
+        ) -> ifcopenshell_wrapper.SvgSerializer:
+            out_filename = transform_string(out_filename)
+            return ifcopenshell_wrapper.TtlWktSerializer(out_filename, geometry_settings, settings)