refactor: move workflow package to dify_graph (#32844)

api/dify_graph/nodes/variable_assigner/v1/node_data.py

@@ -0,0 +1,16 @@
+from collections.abc import Sequence
+from enum import StrEnum
+
+from dify_graph.nodes.base import BaseNodeData
+
+
+class WriteMode(StrEnum):
+    OVER_WRITE = "over-write"
+    APPEND = "append"
+    CLEAR = "clear"
+
+
+class VariableAssignerData(BaseNodeData):
+    assigned_variable_selector: Sequence[str]
+    write_mode: WriteMode
+    input_variable_selector: Sequence[str]