chore(wayland): window state handling

core/src/event/wayland/window.rs

@@ -1,8 +1,12 @@
 #![allow(missing_docs)]
 
+use cctk::sctk::reexports::csd_frame::WindowState;
+
 /// window events
 #[derive(Debug, PartialEq, Clone)]
 pub enum WindowEvent {
     /// Window suggested bounds.
     SuggestedBounds(Option<crate::Size>),
+    /// Window state
+    WindowState(WindowState),
 }