[!!!][TASK] Move menus properties into dataprocessor

[linawolf]

Keep HMENU / TMENU for backward compability
reasons but remove outdated examples.

Some special menu types still rely on HMENU,
I will work on them in follow-ups.

Releases: main, 13.4

[github-actions]

The backport to 12.4 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

error: could not apply c6952702... [!!!][TASK] Move menus properties into dataprocessor
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
hint: Disable this message with "git config advice.mergeConflict false"

stdout

Auto-merging Documentation/ContentObjects/Hmenu/Tmenu/Index.rst
Auto-merging Documentation/ContentObjects/Hmenu/Tmenu/Tmenuitem.rst
Auto-merging Documentation/DataProcessing/Index.rst
CONFLICT (content): Merge conflict in Documentation/DataProcessing/Index.rst
CONFLICT (modify/delete): Documentation/DataProcessing/MenuProcessor.rst deleted in c6952702 ([!!!][TASK] Move menus properties into dataprocessor) and modified in HEAD.  Version HEAD of Documentation/DataProcessing/MenuProcessor.rst left in tree.
Auto-merging Documentation/DataProcessing/MenuProcessor/Browse.rst
Auto-merging Documentation/DataProcessing/MenuProcessor/Language.rst
Auto-merging Documentation/DataProcessing/MenuProcessor/Rootline.rst
CONFLICT (rename/delete): Documentation/ContentObjects/Hmenu/_code-snippets/_BreadcrumbDataProcessor.typoscript renamed to Documentation/DataProcessing/MenuProcessor/_code-snippets/_BreadcrumbDataProcessor.typoscript in c6952702 ([!!!][TASK] Move menus properties into dataprocessor), but deleted in HEAD.
CONFLICT (rename/delete): Documentation/ContentObjects/Hmenu/_code-snippets/_BreadcrumbLib.typoscript renamed to Documentation/DataProcessing/MenuProcessor/_code-snippets/_BreadcrumbLib.typoscript in c6952702 ([!!!][TASK] Move menus properties into dataprocessor), but deleted in HEAD.
CONFLICT (rename/delete): Documentation/ContentObjects/Hmenu/_code-snippets/_LanguageMenuLib.typoscript renamed to Documentation/DataProcessing/MenuProcessor/_code-snippets/_LanguageMenuLib.typoscript in c6952702 ([!!!][TASK] Move menus properties into dataprocessor), but deleted in HEAD.
CONFLICT (rename/delete): Documentation/ContentObjects/Hmenu/_code-snippets/_RelPrevNextMenu.typoscript renamed to Documentation/DataProcessing/MenuProcessor/_code-snippets/_RelPrevNextMenu.typoscript in c6952702 ([!!!][TASK] Move menus properties into dataprocessor), but deleted in HEAD.

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-12.4 12.4
# Navigate to the new working tree
cd .worktrees/backport-12.4
# Create a new branch
git switch --create backport-1484-to-12.4
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick c6952702e634a82b29d5af87f3270f489ddaabf9
# Push it to GitHub
git push --set-upstream origin backport-1484-to-12.4
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-12.4

Then, create a pull request where the base branch is 12.4 and the compare/head branch is backport-1484-to-12.4.