fix(linux): libinput "disable while typing" while kanata is running (#…

…661)

Change virtual output device's bus_type from BUS_USB to BUS_I8042.

This fixes the dwt issues for me on Hyprland and I haven't noticed any
regression caused by this change.

Tested manually in Hyprland with `disable_while_typing=1`

Closes #548
Closes #659

src/oskbd/linux.rs

@@ -347,7 +347,9 @@ impl KbdOut {
 
         let mut device = uinput::VirtualDeviceBuilder::new()?
             .name("kanata")
-            .input_id(evdev::InputId::new(evdev::BusType::BUS_USB, 1, 1, 1))
+            // libinput's "disable while typing" feature don't work when bus_type
+            // is set to BUS_USB, but appears to work when it's set to BUS_I8042.
+            .input_id(evdev::InputId::new(evdev::BusType::BUS_I8042, 1, 1, 1))
             .with_keys(&keys)?
             .with_relative_axes(&relative_axes)?
             .build()?;