[DOCS] Document Fluid versions for TYPO3 versions (#6420)

* [DOCS] Document Fluid versions for TYPO3 versions

Original patch: TYPO3/Fluid#1248

* Apply suggestions from code review

Co-authored-by: Chris Müller <2566282+brotkrueml@users.noreply.github.com>

---------

Co-authored-by: Lina Wolf <48202465+linawolf@users.noreply.github.com>
Co-authored-by: Chris Müller <2566282+brotkrueml@users.noreply.github.com>

Author: 3 people

Documentation/ApiOverview/Fluid/Index.rst

@@ -18,6 +18,7 @@ Fluid is a templating engine commonly used within TYPO3.
     UsingFluidInTypo3
     DevelopCustomViewhelper
     ViewHelper reference <https://docs.typo3.org/other/typo3/view-helper-reference/main/en-us/>
+    Versions
 
 ..  _fluid-syntax:
 ..  _fluid-variables-reserved:

Documentation/ApiOverview/Fluid/Versions.rst

@@ -0,0 +1,27 @@
+..  include:: /Includes.rst.txt
+..  _fluid-versions:
+
+==============
+Fluid Versions
+==============
+
+Each major TYPO3 version uses a specific Fluid major version. Usually, your
+project will always use the latest minor/patch-level version of that Fluid
+version. However the versions can be out-of-sync for short periods depending
+on your project's update schedule and the release dates of TYPO3 versions.
+
++-----------------+---------------------------------+
+| TYPO3 version   | Fluid version                   |
++=================+=================================+
+| TYPO3 v14       | Fluid 5.x                       |
++-----------------+---------------------------------+
+| TYPO3 v13       | Fluid 4.x                       |
++-----------------+---------------------------------+
+| TYPO3 v12       | Fluid 2.x                       |
++-----------------+---------------------------------+
+| TYPO3 v11       | Fluid 2.7.2                     |
+|                 | (2.x for Composer-based setups) |
++-----------------+---------------------------------+
+
+An overview of all available Fluid versions is available
+`on Packagist <https://packagist.org/packages/typo3fluid/fluid>`_.