doc migration: new directory layout

This patch introduces a new directory layout
in doc/source in conformance with the OpenStack
manuals project migration spec [1], moves the
existing content in manila/doc/source into the
new directories, and adjusts index files accordingly.

This is the first step in the migration process
as outlined in the spec.

[1] https://specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration.html

Partial-Bug: #1706181
Needed-By: Iac9a0180a8b1a45f6f1d84020c6d15f457ad92bf
Depends-On: I92cc896bbd505d10c9dc7101bacb4caedf43da8f
Depends-On: Ia750cb049c0f53a234ea70ce1f2bbbb7a2aa9454

Change-Id: I9c378a188f9009a82100f5488a936d43536bd5b6

README.rst

@@ -118,7 +118,7 @@ expected to redefine enabled_share_protocols as follows:
        'enabled_share_protocols': ['NFS'],
     }
 
-Contributing
+New Features
 ------------
 
 When implementing a new feature, you may think about making it optional,

doc/source/contributor/contributing.rst

@@ -1,4 +1,4 @@
 ============
 Contributing
 ============
-.. include:: ../../CONTRIBUTING.rst
+.. include:: ../../../CONTRIBUTING.rst

doc/source/contributor/readme.rst

@@ -0,0 +1 @@
+.. include:: ../../../README.rst

doc/source/index.rst

@@ -4,17 +4,17 @@
    contain the root `toctree` directive.
 
 Welcome to manila-ui's documentation!
-========================================================
+=====================================
 
 Contents:
 
 .. toctree::
    :maxdepth: 2
 
-   readme
-   installation
-   usage
-   contributing
+   contributor/readme
+   install/installation
+   user/usage
+   contributor/contributing
 
 Indices and tables
 ==================

doc/source/readme.rst

@@ -1 +0,0 @@
-.. include:: ../../README.rst

doc/source/user/usage.rst

@@ -1,7 +1,7 @@
-========
+=====
 Usage
-========
+=====
 
 To use manila-ui in a project::
 
-    import manila_ui
+    import manila_ui