fix(core): add missing dragging prop to GraphNode type

Signed-off-by: braks <78412429+bcakmakoglu@users.noreply.github.com>

packages/core/src/types/node.ts

@@ -83,6 +83,7 @@ export interface GraphNode<Data = ElementData, CustomEvents extends Record<strin
   dimensions: Dimensions
   isParent: boolean
   selected: boolean
+  dragging: boolean
   data: Data
   events: Partial<NodeEventsHandler<CustomEvents>>
 }