feat: add wlr_foreign_toplevel support

diyac.c

@@ -142,6 +142,8 @@ int main(int argc, char *argv[])
      * let us know when new input devices are available on the backend.
      */
     wl_list_init(&server.seat.keyboards);
+    /* foreign toplevel manager for create shell panel for application control */
+    server.foreign_toplevel_manager = wlr_foreign_toplevel_manager_v1_create(server.wl_display);
     diyac_init_seat(&server);
 
     /* Add a Unix socket to the Wayland display. */