Integrate ifcgroups with selector

src/ifcopenshell-python/ifcopenshell/api/group/add_group.py

@@ -24,7 +24,8 @@ class Usecase:
     def __init__(self, file, **settings):
         self.file = file
         self.settings = {
-            "Name": "Unnamed"
+            "Name": "Unnamed",
+            "Description": "",
         }
         for key, value in settings.items():
             self.settings[key] = value
@@ -36,5 +37,6 @@ class Usecase:
                 "GlobalId": ifcopenshell.guid.new(),
                 "OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", self.file),
                 "Name": self.settings["Name"],
+                "Description": self.settings["Description"],
             }
         )