Deprecation: #97312 - Deprecate CSH-related methods

[MohsinQK]

Deprecation: #97312 - Deprecate CSH-related methods

See :issue:97312

Description

In order to be less breaking for extension authors, classes related to Context
Sensitive Help (CSH) have been marked as deprecated:

• :php:TYPO3\CMS\Backend\Template\Components\Buttons\Action\HelpButton

In order to be less breaking for extension authors, methods related to Context
Sensitive Help (CSH) have been marked as deprecated:

• :php:TYPO3\CMS\Backend\Utility\BackendUtility::cshItem()
• :php:TYPO3\CMS\Backend\Template\Components\ButtonBar::makeHelpButton()
• :php:TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addLLrefForTCAdescr()

Also, the following Fluid view helpers are marked as deprecated:

• f:be.buttons.csh (:php:TYPO3\CMS\Fluid\ViewHelpers\Be\Buttons\CshViewHelper)
• f:be.labels.csh (:php:TYPO3\CMS\Fluid\ViewHelpers\Be\Labels\CshViewHelper)

Impact

Using any of the deprecated classes and methods will trigger a PHP :php:E_USER_DEPRECATED error,
with an exception of :php:ExtensionManagementUtility::addLLrefForTCAdescr()
for being a low-level method. The extension scanner will report any usage.

Affected Installations

All extensions using any of the deprecated classes and methods are affected.

Migration

Context Sensitive Help is aimed to get removed in TYPO3 v13, no migration is available.