fix(dock_area): save/restore state is saved in config

bec_widgets/cli/client.py

@@ -1,9 +1,8 @@
 # This file was automatically generated by generate_cli.py
 
+from bec_widgets.cli.client_utils import rpc_call, RPCBase, BECGuiClientMixin
 from typing import Literal, Optional, overload
 
-from bec_widgets.cli.client_utils import BECGuiClientMixin, RPCBase, rpc_call
-
 
 class BECPlotBase(RPCBase):
     @property
@@ -1528,6 +1527,16 @@ class BECDock(RPCBase):
 
 
 class BECDockArea(RPCBase, BECGuiClientMixin):
+    @property
+    @rpc_call
+    def config_dict(self) -> "dict":
+        """
+        Get the configuration of the widget.
+
+        Returns:
+            dict: The configuration of the widget.
+        """
+
     @property
     @rpc_call
     def panels(self) -> "dict":