input: add a default seat

jay-config/src/_private/client.rs

@@ -576,6 +576,10 @@ impl Client {
         self.send(&ClientMessage::SetDoubleClickDistance { dist });
     }
 
+    pub fn disable_default_seat(&self) {
+        self.send(&ClientMessage::DisableDefaultSeat);
+    }
+
     pub fn connector_set_position(&self, connector: Connector, x: i32, y: i32) {
         self.send(&ClientMessage::ConnectorSetPosition { connector, x, y });
     }

jay-config/src/_private/ipc.rs

@@ -381,6 +381,7 @@ pub enum ClientMessage<'a> {
         env: Vec<(String, String)>,
         fds: Vec<(i32, i32)>,
     },
+    DisableDefaultSeat,
 }
 
 #[derive(Serialize, Deserialize, Debug)]