[TASK] Add inline syntax to Fluid syntax

[sypets]

Some content was migrated from the Extbase book but has been
considerably shortened.

Related: TYPO3-Documentation/TYPO3CMS-Book-ExtbaseFluid#536

[github-actions]

The backport to 10.4 failed:

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

stderr

error: could not apply cd9f5f23... [TASK] Add inline syntax to Fluid syntax
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".

stdout

CONFLICT (modify/delete): Documentation/ApiOverview/Fluid/Syntax.rst deleted in HEAD and modified in cd9f5f23 ([TASK] Add inline syntax to Fluid syntax).  Version cd9f5f23 ([TASK] Add inline syntax to Fluid syntax) of Documentation/ApiOverview/Fluid/Syntax.rst left in tree.

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-10.4 10.4
# Navigate to the new working tree
cd .worktrees/backport-10.4
# Create a new branch
git switch --create backport-1948-to-10.4
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick cd9f5f232c04e898a185033f001faf1d748c0038
# Push it to GitHub
git push --set-upstream origin backport-1948-to-10.4
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-10.4

Then, create a pull request where the base branch is 10.4 and the compare/head branch is backport-1948-to-10.4.

[linawolf]

Page didn't exist in 10.4 yet