Add a README.md

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

.rustfmt.toml

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+imports_granularity="Crate"

README.md

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+# QEMU D-Bus display experiment
+
+## Introduction
+
+*WIP* Rust crates to interact with a ``-display dbus`` QEMU. The development
+branch is currently: https://gitlab.com/marcandre.lureau/qemu/-/tree/dbus
+
+See also the QEMU mailing list for progress.
+
+Most dependencies are released, but notably zbus 2.0 is still in beta. RDW and
+VTE4 widgets are also unreleased at this stage.
+
+## Features
+
+Depending on what the VM exposes & supports, various interfaces are implemented:
+
+ - display, with optional DMABUF sharing
+ - display resize
+ - keyboard & mouse
+ - serial terminals
+ - QMP/HMP monitors
+ - audio playback & recording
+ - USB device redirection
+ - clipboard sharing
+
+## Project organization
+
+### qemu-display
+
+This crate provides simple D-Bus interfaces through zbus, and some basic abstractions.
+
+### qemu-rdw
+
+This crate aims to provide Gtk+ 4 widget for a QEMU display, as well as
+dialogs/widgets for USB redirection and other options or features.
+
+Currently it's a demo app (run by default with `cargo run`). 
+
+It is also based on a *WIP* crate "RDW" (*Remote display/desktop widget*) to
+provide a base widget for various remote display solutions (VNC, RDP, Spice
+etc).
+
+### qemu-vnc
+
+A simple VNC server implementation.
+
+### qemu-vte
+
+A standalone VTE/Gtk+ 4 client, which should eventually be a consumable crate or
+integrated with qemu-rdw.
+
+## Build requirements
+
+To build this project, you will need several system libraries. Here is the
+current list of build dependencies on Fedora:
+
+```sh
+$ sudo dnf install cargo gcc usbredir-devel wayland-devel libxkbcommon-devel glib2-devel gtk4-devel gstreamer1-devel gstreamer1-plugins-base-devel
+```