[TASK] Add customization examples for felogin

Adds examples of how to override core templates.

Resolves: #90566
Releases: master, 10.4
Change-Id: I09f7b89542cc7f22c56b6689b9e9b6d0d066fc74
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63478

Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/core/Documentation/Changelog/10.2/Feature-88102-FrontendLoginViaFluidAndExtbase.rst

@@ -27,4 +27,24 @@ for customization. All existing templates are found in
 
 EXT:felogin/Resources/Private/Templates/{Login,PasswordRecovery}
 
+Examples
+========
+
+Overriding Templates:
+All templates are now fluid based, which means they can be overridden by other extensions via typoscript. For example:
+
+To overwrite the :php:`\TYPO3\CMS\FrontendLogin\Controller\LoginController::loginAction()` template with an own one
+located in :file:`EXT:my_extension/Resources/Private/Templates/Felogin/Login/Login.html`, the following config will do
+the trick.
+
+.. code-block:: typoscript
+
+   plugin.tx_felogin_login {
+     view {
+       templateRootPaths {
+         10 = EXT:my_extension/Resources/Private/Templates/Felogin/
+       }
+     }
+   }
+
 .. index:: Frontend, LocalConfiguration, ext:felogin