Add twig reference docs for the t() function

Author: natewiebe13

reference/twig_reference.rst

@@ -304,6 +304,27 @@ impersonation_exit_url
 It's similar to the `impersonation_exit_path`_ function, but it generates
 absolute URLs instead of relative URLs.
 
+t
+~
+
+.. code-block:: twig
+
+    {{ t(message, parameters = [], domain = 'messages')|trans }}
+
+``message``
+    **type**: ``string``
+``parameters`` *(optional)*
+    **type**: ``array`` **default**: ``[]``
+``domain`` *(optional)*
+    **type**: ``string`` **default**: ``messages``
+
+.. versionadded:: 5.2
+
+    The ``t()`` function was introduced in Symfony 5.2.
+
+Creates a ``Translatable`` object that can be passed to the
+:ref:`trans filter <reference-twig-filter-trans>`.
+
 Form Related Functions
 ~~~~~~~~~~~~~~~~~~~~~~
 
@@ -341,6 +362,8 @@ Makes a technical name human readable (i.e. replaces underscores by spaces
 or transforms camelCase text like ``helloWorld`` to ``hello world``
 and then capitalizes the string).
 
+.. _reference-twig-filter-trans:
+
 trans
 ~~~~~
 
@@ -357,6 +380,10 @@ trans
 ``locale`` *(optional)*
     **type**: ``string`` **default**: ``null``
 
+.. versionadded:: 5.2
+
+    ``message`` accepting ``Translatable`` as a valid type was introduced in Symfony 5.2.
+
 Translates the text into the current language. More information in
 :ref:`Translation Filters <translation-filters>`.