Add reno for releasenotes management

An initial patch to add reno and create a base directory for
release notes

Change-Id: Ia8dbcf1aed76946a3f64c8d437f85ae88069db57

doc/source/index.rst

@@ -63,11 +63,7 @@ available in your browser at http://localhost:8080/
 Release Notes
 =============
 
-.. toctree::
-  :glob:
-  :maxdepth: 1
-
-  releases/*
+https://docs.openstack.org/releasenotes/zun-ui
 
 Source Code Reference
 =====================
@@ -77,5 +73,3 @@ Source Code Reference
   :maxdepth: 1
 
   sourcecode/autoindex
-
-

releasenotes/notes/add-reno-d6cc570f7a86e445.yaml

@@ -0,0 +1,4 @@
+---
+other:
+  - Switch to reno for managing release notes.
+

releasenotes/source/index.rst

@@ -1,16 +1,8 @@
-Welcome to Zun-UI Release Notes documentation!
-==============================================
-
-Contents
-========
+====================
+Zun UI Release Notes
+====================
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 1
 
    unreleased
-
-Indices and tables
-==================
-
-* :ref:`genindex`
-* :ref:`search