Add move-column-to-monitor* binds

As opposed to move-window-to-monitor*

niri-config/src/lib.rs

@@ -421,6 +421,10 @@ pub enum Action {
     MoveWindowToMonitorRight,
     MoveWindowToMonitorDown,
     MoveWindowToMonitorUp,
+    MoveColumnToMonitorLeft,
+    MoveColumnToMonitorRight,
+    MoveColumnToMonitorDown,
+    MoveColumnToMonitorUp,
     SetWindowHeight(#[knuffel(argument, str)] SizeChange),
     SwitchPresetColumnWidth,
     MaximizeColumn,