Can we amend the protocol to allow the exchange of various settings, such as "desired DPI / scaling"

edit: looks like it might already be provided via wl_output::scale [1] except you get the wrong effect that way. You want to tell the client what DPI they should render at, so that you can keep scaling at = 1

[1]: https://wayland.freedesktop.org/docs/html/apa.html#protocol-...