input: add support for natural scrolling

Closes #69

jay-config/src/_private/client.rs

@@ -617,6 +617,10 @@ impl Client {
         self.send(&ClientMessage::SetTapEnabled { device, enabled })
     }
 
+    pub fn set_input_natural_scrolling_enabled(&self, device: InputDevice, enabled: bool) {
+        self.send(&ClientMessage::SetNaturalScrollingEnabled { device, enabled })
+    }
+
     pub fn set_input_drag_enabled(&self, device: InputDevice, enabled: bool) {
         self.send(&ClientMessage::SetDragEnabled { device, enabled })
     }

jay-config/src/_private/ipc.rs

@@ -330,6 +330,10 @@ pub enum ClientMessage<'a> {
     GetWorkspaceCapture {
         workspace: Workspace,
     },
+    SetNaturalScrollingEnabled {
+        device: InputDevice,
+        enabled: bool,
+    },
 }
 
 #[derive(Encode, Decode, Debug)]