feat(wm): add workspace reconciliator module

This commit adds the workspace_reconciliator module which uses a tightly
bounded channel (cap: 1) to update the focused workspace in situations
where the user or another process has foregrounded a window that is on a
different workspace.

This most often happens via Alt-Tab, or by clicking a link which opens
in another application.

workspace_reconciliator::Notification contains the target monitor and
workspace indices, which when received allows for the correct workspace to
be focused.

These notifications are sent in process_event.rs when handling
WindowManagerEvent::Show, Manage and Uncloak events.

All previous logic pertaining to workspace reconciliation which lived in
the handler for these events has been removed and replaced with
notifications sent to the reconciliator.

As the notifications channel is tightly capped and any notifications
which overflow the cap will never be delivered, we are able to avoid the
infinite workspace switching loops which happened when using the
previous logic, which ran on every single event.

komorebi/src/lib.rs

@@ -21,6 +21,7 @@ pub mod windows_callbacks;
 pub mod winevent;
 pub mod winevent_listener;
 pub mod workspace;
+pub mod workspace_reconciliator;
 
 use lazy_static::lazy_static;
 use std::collections::HashMap;