fix(wm): ensure default CrossBoundaryBehaviour consistency

This commit fixes the default for `CrossBoundaryBehaviour` which was set
to `Monitor` when loading a user configuration but was set to
`Workspace` if starting from fresh without a user config.

The docs also stated that this value was `Monitor` by default.

Author: alex-ds13

komorebi/src/window_manager.rs

@@ -438,7 +438,7 @@ impl WindowManager {
             work_area_offset: None,
             window_management_behaviour: WindowManagementBehaviour::default(),
             cross_monitor_move_behaviour: MoveBehaviour::Swap,
-            cross_boundary_behaviour: CrossBoundaryBehaviour::Workspace,
+            cross_boundary_behaviour: CrossBoundaryBehaviour::Monitor,
             unmanaged_window_operation_behaviour: OperationBehaviour::Op,
             resize_delta: 50,
             focus_follows_mouse: None,