feat(wm): add noop cross-monitor-move-behaviour

This commit adds a new "NoOp" MoveBehaviour for users who don't want any
moves to happen across monitor boundaries. The
toggle-cross-monitor-move-behaviour will only toggle between Swap and
Insert, and will do nothing if NoOp is the selected MoveBehaviour.

resolve #667

komorebi-core/src/lib.rs

@@ -283,6 +283,8 @@ pub enum MoveBehaviour {
     Swap,
     /// Insert the window container into the focused workspace on the adjacent monitor
     Insert,
+    /// Do nothing if trying to move a window container in the direction of an adjacent monitor
+    NoOp,
 }
 
 #[derive(

komorebi/src/process_command.rs

@@ -1187,6 +1187,7 @@ impl WindowManager {
                     MoveBehaviour::Insert => {
                         self.cross_monitor_move_behaviour = MoveBehaviour::Swap;
                     }
+                    _ => {}
                 }
             }
             SocketMessage::CrossMonitorMoveBehaviour(behaviour) => {

komorebi/src/window_manager.rs

@@ -1333,6 +1333,11 @@ impl WindowManager {
             // If there is nowhere to move on the current workspace, try to move it onto the monitor
             // in that direction if there is one
             None => {
+                // Don't do anything if the user has set the MoveBehaviour to NoOp
+                if matches!(self.cross_monitor_move_behaviour, MoveBehaviour::NoOp) {
+                    return Ok(());
+                }
+
                 let target_monitor_idx = self
                     .monitor_idx_in_direction(direction)
                     .ok_or_else(|| anyhow!("there is no container or monitor in this direction"))?;