Update project readme

- add services added recently
- add info about sdk/cli/tui that are generated using codegenerator.

Change-Id: Id41a3262be58deefd1f127a4c1a0df0b3b2e0aec

README.rst

@@ -12,12 +12,27 @@ running. The generator then tries to initialize the service application and for
 supported services scans for the exposed operations. At the moment the
 following services are covered:
 
-- Nova
-- Neutron
 - Cinder
+- Designate
 - Glance
+- Ironic
 - Keystone
+- Magnum
+- Manila
+- Neutron
+- Nova
 - Octavia
+- Placement
+
+In addition to building OpenAPI specs `CodeGenerator` is also used to build
+SDK, CLI and TUI in Rust for OpenStack. Those live currently in `this GitHub
+repository <https://github.com/gtema/openstack>`_.
+
+.. note::
+
+   CodeGenerator is not intended to be used outside of OpenStack context (while
+   maybe it will even work). It is used primarily in the automatic pipelines.
+   For this reason it is not published to the PyPy.
 
 Getting started
 ---------------