Add shell scripting guides to development README

Closes #64016

See merge request gitlab-org/gitlab-ce!31467

Update Unicorn Worker recommendation

See merge request gitlab-org/gitlab-ce!31404

Docs - Strongly discourage installing ES on the same server as GitLab

See merge request gitlab-org/gitlab-ce!30169

Remove visual review app feature flag

See merge request gitlab-org/gitlab-ce!31429

Refactor passing props to jobs/index.js

See merge request gitlab-org/gitlab-ce!31472

Use groups in CODEOWNERS file

See merge request gitlab-org/gitlab-ce!31477

Resolve "Update troubleshooting for gzip error in backup docs"

Closes #64729

See merge request gitlab-org/gitlab-ce!30884

Let's dogfood https://gitlab.com/gitlab-org/gitlab-ce/issues/53182

That way we don't need to keep this file up to date.

Clarify requirements for custom metrics in docs

See merge request gitlab-org/gitlab-ce!31286

- Also add requirements to the docs for custom metrics.

Update Gitaly troubleshooting

See merge request gitlab-org/gitlab-ce!30924

Fix some Markdown lint errors

See merge request gitlab-org/gitlab-ce!31473

Introduced in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30295

Update rules for secure features

See merge request gitlab-org/gitlab-ce!31432

Remove CephFS from example

See merge request gitlab-org/gitlab-ce!31422

Add minimal partial clone docs

Closes gitaly#1581

See merge request gitlab-org/gitlab-ce!30295

Partial Clone and Sparse Checkout are the native Git approach to enormous
repositories. We should document the state of these features and update as our
support and Git's support for these features improves.

Fix docs review-app stages in the pipeline

See merge request gitlab-org/gitlab-ce!31464

Optimize  relative re-positioning

See merge request gitlab-org/gitlab-ce!30938

Resolve "Kubernetes > Applications > Uninstall Cert Manager"

See merge request gitlab-org/gitlab-ce!31166

Enhance style of the shared runners limit

See merge request gitlab-org/gitlab-ce!31386

It also prepare for the EE merge request https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14786

(CE Port) Upgrade gitlab-ui to 5.12.1

See merge request gitlab-org/gitlab-ce!31466

Update dependency @gitlab/ui to v5.12.1

See merge request gitlab-org/gitlab-ce!31461

Also removes unnecessary methods causing extra queries

Moving of neighbour items was done recursively - this
was extremely expensive when multiple items had to be moved.

This change optimizes the code to find nearest possible gap where
items can be moved and moves all of them with single update query.

Extend PipelineProcessWorker to accept a list of builds

See merge request gitlab-org/gitlab-ce!31425

Fix display of performance bar shortcut help text

See merge request gitlab-org/gitlab-ce!31403

Add support for deferred links in persistent user callouts.

Closes #64341

See merge request gitlab-org/gitlab-ce!30818

Persistent user callouts now support deferred links, which are links
that can be used to dismiss the callout, and then proceed to follow
the link's original location.

This ensures that the callout dismissal is properly recorded
before the user leaves the page.

Add outbound setting for system hooks

See merge request gitlab-org/gitlab-ce!31177