add s4u-cloud-simple to the list of examples

This example and the other cloud ones should probably be rewritten to
be more informative to the users, one day. This commit mostly create a
section in the list of examples that I'll be able to link to from the
main web page.

diff --git a/examples/s4u/README.rst b/examples/s4u/README.rst
index 5adf1d3..7e8af8d 100644 (file)
--- a/examples/s4u/README.rst
+++ b/examples/s4u/README.rst
@@ -406,7 +406,15 @@ Distributed Hash Tables (DHT)
     One of the most famous DHT protocol.
     |br| `examples/s4u/dht-chord/s4u-dht-chord.cpp <https://framagit.org/simgrid/simgrid/tree/master/examples/s4u/dht-chord/s4u-dht-chord.cpp>`_
 
-.. TODO:: document here the examples about plugins
+Simulating Clouds
+-----------------
+
+  - **Cloud basics**
+    This example starts some computations both on PMs and VMs, and
+    migrates some VMs around.
+    |br| `examples/s4u/cloud-simple/s4u-cloud-simple.cpp <https://framagit.org/simgrid/simgrid/tree/master/examples/s4u/cloud-simple/s4u-cloud-simple.cpp>`_
+
+.. TODO:: document here the examples about clouds and plugins
 
 =======================
 Model-Checking Examples