Add max_render_time to view JSON

sway/ipc-json.c

@@ -418,6 +418,8 @@ static void ipc_json_describe_view(struct sway_container *c, json_object *object
 	struct wlr_box geometry = {0, 0, c->view->natural_width, c->view->natural_height};
 	json_object_object_add(object, "geometry", ipc_json_create_rect(&geometry));
 
+	json_object_object_add(object, "max_render_time", json_object_new_int(c->view->max_render_time));
+
 #if HAVE_XWAYLAND
 	if (c->view->type == SWAY_VIEW_XWAYLAND) {
 		json_object_object_add(object, "window",