New Feature to add Tasks and Task Relationships in the python ifcopenshell API (#1432)

src/ifcopenshell-python/ifcopenshell/api/sequence/add_task.py

@@ -0,0 +1,20 @@
+import ifcopenshell.api
+
+
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"name": None, "predefined_type": "NOTDEFINED", "is_milestone":False, "identification": "none", "predecessor_to":None, "successor_from":None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        task = ifcopenshell.api.run(
+            "root.create_entity",
+            self.file,
+            ifc_class="IfcTask",
+            predefined_type=self.settings["predefined_type"],
+            name=self.settings["name"],
+        )
+        task.IsMilestone = self.settings["is_milestone"]
+        return task