Improve performance of triggered chat commands

See merge request !8876

When the trigger endpoint is called, it has to find the right service
for the given project. However, the old implementation did much more.

For example, it build a list of the missing services on this project.
This whole process took about 750ms _each time_. The current
implementation is expected to perform 10x better, as it only searches in
the current projects services. Given the service has to be configured
anyway, this can be done.

Document how to vue

See merge request !8866

Fix the documentation to use the correct variable in a code example

See merge request !8585

Puts back trailing whitespace

Changes after review

Changes after review

Adds Changelog entry

Follow documentation styleguide

Resolve "Cannot login with 2fa"

Closes #27047

See merge request !8730

Don't group issue, merge request and TODO lists by project

Closes #23634

See merge request !8519

add information that docker registry storage needs to be accessible for docker clients

See merge request !8179

Added test for initial merge request widget state

See merge request !8738

Changed composer installer script in the CI PHP example doc

See merge request !8817

Ensure autogenerated title does not cause failing spec

Closes #26933

See merge request !8693

UX Guide: minor updates

See merge request !8862

[ci skip] UX guide: clean up term tables in copy

[ci skip] UX guide: update dropdown max height for multiline items

Remove hard-coded absolute URLs from all frontend assets

See merge request !8831

Fixed Issuable sidebar so it remains closed on mobile/smaller screen devices

See merge request !7466

Refactor overall code and fix failing specs

Fix Project#to_reference

Fix wrong spaces and update changelog

Refactor #to_reference for Project & Issue

Fix and improves Project#to_reference

Merge branch '27248-filtered-search-does-not-allow-filtering-labels-with-multiple-words' into 'master'

Fix filtering label and milestone with multiple words

Closes #27248 and #27334

See merge request !8830

Resolve "NameError: uninitialized constant ApplicationSetting::DEFAULTS"

Closes #27280

See merge request !8805