MksScreenAttributes is an opaque type with setters so that we can
potentially extend it in the future without ABI issues.
Furthermore, this adds a configure API for both sync and async to
MksScreen.
Currently, I get NOT_SUPPORTED back from Qemu, but I think that's because
I'm not even past the bootloader/EFI stage for tests.
Adds MksKeyboard and MksMouse types. Setup a MksScreenKind for the
MksScreen based on MksQemuConsole:type property. Currently the keyboard
and mouse are not wired up, but here for scoping out the properties.
This library doesn't do much yet. It contains the scaffolding and the
rough shape of what I think the API should be in mks-types.h. Some of the
types have some skeleton implementation as well to hid the D-Bus API
behind those types.
The next steps are to fill out the other wrapper objects and see what
properties we should expose from the underlying D-Bus proxies.
Along with that, will be a GtkWidget which can have a number of properties
set on it to specify the MksScreen, MksKeyboard, and MksMouse devices. It
may make sense to attach the session + screen to the widget, so that it can
adapt to keyboard and mouse changes though.
