feat(wayland): serial counter

src/wayland/mod.rs

@@ -12,6 +12,7 @@ mod xdg_shell;
 use self::{state::WaylandState, surface::CORE_SURFACES};
 use crate::wayland::state::ClientState;
 use color_eyre::eyre::{ensure, Result};
+use global_counter::primitive::exact::CounterU32;
 use once_cell::sync::OnceCell;
 use parking_lot::Mutex;
 use slog::Drain;
@@ -32,6 +33,8 @@ use tokio::{
 };
 use tracing::info;
 
+pub static SERIAL_COUNTER: CounterU32 = CounterU32::new(0);
+
 struct EGLRawHandles {
 	display: *const c_void,
 	config: *const c_void,