Remove chapter legacy installation from working with extensions

[mkiebele]

No description provided.

[linawolf]

We must move the content somewhere before we remove it from here. And redirects are needed

[github-actions]

The backport to 12.4 failed:

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

stderr

error: could not apply c9d044e... [TASK] Remove chapter legacy installation from working with extensions
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/Extensions/Index.rst
CONFLICT (content): Merge conflict in Documentation/Extensions/Index.rst

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-525-to-12.4
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick c9d044e7e5c45b3af09b228536a8d3b518917bdd,ef5054cd9b8bc1cf2fbc640f98951fe81dcbefdc,a85b2d5626c2d060e80459b0809923befdb6c3c1
# Push it to GitHub
git push --set-upstream origin backport-525-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-525-to-12.4.

[github-actions]

The backport to 13.4 failed:

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

stderr

error: could not apply c9d044e... [TASK] Remove chapter legacy installation from working with extensions
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/Extensions/Index.rst
CONFLICT (content): Merge conflict in Documentation/Extensions/Index.rst

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-13.4 13.4
# Navigate to the new working tree
cd .worktrees/backport-13.4
# Create a new branch
git switch --create backport-525-to-13.4
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick c9d044e7e5c45b3af09b228536a8d3b518917bdd,ef5054cd9b8bc1cf2fbc640f98951fe81dcbefdc,a85b2d5626c2d060e80459b0809923befdb6c3c1
# Push it to GitHub
git push --set-upstream origin backport-525-to-13.4
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-13.4

Then, create a pull request where the base branch is 13.4 and the compare/head branch is backport-525-to-13.4.