feat(wm): add monitor index preference cmd

This commit adds a new komorebic command, monitor-index-preference,
which allows the user to set the index preference within the VecDeque of
monitors based on the "size" of a display.

This works as the size Rect identifies a unique display on the greater
virtual screen and persists across display connections and
disconnections unless the user deliberately changes the positioning of
the display monitor on the virtual screen.

When a new monitor is added to the state, the monitor preferences will
be checked, and if a preference exists, the new monitor will be inserted
at that index, otherwise, it will be pushed to the back of the VecDeque.

resolve #275

komorebi-core/src/lib.rs

@@ -72,6 +72,7 @@ pub enum SocketMessage {
     ChangeLayoutCustom(PathBuf),
     FlipLayout(Axis),
     // Monitor and Workspace Commands
+    MonitorIndexPreference(usize, i32, i32, i32, i32),
     EnsureWorkspaces(usize, usize),
     NewWorkspace,
     ToggleTiling,