[TASK] Add Index.rst to master folder

Resolves: #79555
Releases: master
Change-Id: I1a7523dbc87907cba754c405cc4bbf9050a51255
Reviewed-on: https://review.typo3.org/51470


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Tested-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>

typo3/sysext/core/Documentation/Changelog/master/Index.rst

+
+.. include:: ../../Includes.txt
+
+master changes
+==============
+
+**Table of contents**
+
+.. contents::
+   :local:
+   :depth: 1
+
+Breaking Changes
+^^^^^^^^^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Breaking-*
+
+Features
+^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Feature-*
+
+Deprecation
+^^^^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Deprecation-*
+
+Important
+^^^^^^^^^
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+   :glob:
+
+   Important-*