[TASK] Add link to FlexForms description on FlexForm page

Additionally, add line breaks after 80 characters.

Releases: main, 12.4, 11.5

Documentation/ColumnsConfig/Type/Flex/Index.rst

@@ -1,22 +1,24 @@
-.. include:: /Includes.rst.txt
-.. _columns-flex:
+..  include:: /Includes.rst.txt
+..  _columns-flex:
 
 ==============
 FlexForm field
 ==============
 
-Renders a FlexForm element. Essentially this consists in a hierarchically organized set of fields which will have
-their values saved into a single field in the database, stored as XML.
+Renders a :ref:`FlexForm <flexforms>` element. Essentially, this consists in a
+hierarchically organized set of fields which will have their values saved into a
+single field in the database, stored as XML.
 
-The general idea is: There is a data structure that defines which and how single fields should be displayed,
-re-using all the `TCA` column type possibilities. The actual values of single fields are then stored
-in an XML representation within this "flex" field.
+The general idea is: There is a data structure that defines which and how single
+fields should be displayed, re-using all the TCA column type possibilities. The
+actual values of single fields are then stored in an XML representation within
+this "flex" field.
 
 
-.. toctree::
-   :titlesonly:
+..  toctree::
+    :titlesonly:
 
-   AboutDataStructures
-   FlexformSyntax
-   Examples
-   Properties/Index
+    AboutDataStructures
+    FlexformSyntax
+    Examples
+    Properties/Index