TYPO3 Core

As proposed in the slack channel #typo3-cms-coredev we should get rid of the CSH (context sensitive help) completely for TYPO3 v12

• The help is not really context sensitive, it only relies on tablename and fieldname, if a field is used for different purposes in different content types, the CSH always shows the same help
• There is outdated information in CSH (e.g. Screenshots form TYPO3 4.x) and noone is available to update the information
• Some CSH descriptions explain the same content with different words which is confusing (e.g. tt_content - CType > Title: "Type" > CSH Tooltip: "Select the kind of Page Content this element represents. New options will appear when you save the record.")
• Many CSH texts do not provide useful additional information (e.g. tt_content - header > Title: "Header" > CSH Tooltip: "Enter header text for the Content Element.")
• The currently available online documentation https://docs.typo3.org/ improved a lot and should helps better than the CSH in most cases, as it is up to date
• CSH is hidden for most users currently, as it is only available by clicking on a label (no hint that help is available without hovering the label by mouse, not available for keyboard users)
• description is available for explainations when they are required. Adding relevant information as description will help everyone as it is visible. Additionally breaking changes on a field that need adjustment of the description will be observed.
• The removal was already proposed in 2019 (see https://decisions.typo3.org/t/drop-context-sensitive-help-in-core/511) and most arguments against removal can be solved using the description or by linking to the official documentation
• Removal of CSH also removes a lot of outdated files (and results in smaller footprint of the TYPO3 core package)