wayland: Rework handlers and protocols into separate files

src/wayland/handlers/toplevel_info.rs

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+use crate::{
+    state::State,
+    wayland::protocols::toplevel_info::{
+        ToplevelInfoHandler,
+        ToplevelInfoState,
+        delegate_toplevel_info,
+    },
+};
+
+impl ToplevelInfoHandler for State {
+    fn toplevel_info_state(&self) -> &ToplevelInfoState<State> {
+        &self.common.shell.toplevel_info_state
+    }
+    fn toplevel_info_state_mut(&mut self) -> &mut ToplevelInfoState<State> {
+        &mut self.common.shell.toplevel_info_state
+    }
+}
+
+delegate_toplevel_info!(State);