Add index page for plugins documents
Now we have more documents for plugins on stable release,
support and their testing policy. Let's prepare a
index page for it will be easy for plugins maintainer.
Also renaming the stable support policy section to have a clear
name.
Adding redirect links for moved documents.
Change-Id: I17a9a6e0e88605a0ee5047678d6ed168c31396ec
diff --git a/.gitignore b/.gitignore
index 9767e52..8b6222e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,7 +31,7 @@
!.coveragerc
cover/
doc/source/_static/tempest.conf.sample
-doc/source/plugin-registry.rst
+doc/source/plugins/plugin-registry.rst
# Files created by releasenotes build
releasenotes/build