[TASK] Add reference to BeforeLoadedPageTsConfigEvent

Related: TYPO3-Documentation/Changelog-To-Doc#645
Releases: main

Documentation/PageTsconfig/Index.rst

@@ -1,7 +1,7 @@
-.. include:: /Includes.rst.txt
-.. index:: ! Page TSconfig
-.. _pagetsconfig:
-.. _pagetoplevelobjects:
+..  include:: /Includes.rst.txt
+..  index:: ! Page TSconfig
+..  _pagetsconfig:
+..  _pagetoplevelobjects:
 
 =======================
 Page TSconfig Reference
@@ -18,16 +18,18 @@ Note that the page TSconfig can be overridden on a user and group basis by
 user TSconfig again, for details, see section
 :ref:`Overriding Page TSconfig in User TSconfig <userrelationshiptovaluessetinpagetsconfig>`.
 
+The PSR-14 event :ref:`t3coreapi:BeforeLoadedPageTsConfigEvent` can be used to
+add global static page TSconfig before anything else is loaded.
 
-.. toctree::
- :maxdepth: 5
- :titlesonly:
+..  toctree::
+  :maxdepth: 5
+  :titlesonly:
 
- Mod
- Options
- Rte
- TcaDefaults
- TceForm
- TceMain
- Templates
- Tx
+  Mod
+  Options
+  Rte
+  TcaDefaults
+  TceForm
+  TceMain
+  Templates
+  Tx