graphics/kanshi: add new port
kanshi allows you to define output profiles that are automatically
enabled and disabled on hotplug. For instance, this can be used to
turn a laptop's internal screen off when docked.
This is a Wayland equivalent for tools like autorandr. kanshi can be
used on Wayland compositors supporting wlr-output-management protocol.
Sway users: kanshi requires Sway 1.2 or later.