Notify the user who set auto-merge when merge is not possible

Closes #23524

See merge request !8056

Speed up dashboard milestone index by scoping IssuesFinder to user authorized projects

See merge request !8524

Add Slack slash commands to project services list index

See merge request !8636

[ci skip]

Shows current user on top of filtered dropdown list

Closes #26765

See merge request !8612

Fix search bar filter dropdown scrollbars

Closes #26777

See merge request !8615

Fixes big pipeline and small pipeline width problems

Closes #26667

See merge request !8593

better UI fix - simple solution - pipelines#index mini_graph in Vue

See merge request !8614

correct User-agent placement in robots.txt

Closes #26807

See merge request !8623

Refactor cycle analytics stages (1st iteration)

See merge request !7647

Time tracking API

Closes #25861

See merge request !8483

Add a `:repository` trait to the `:empty_project` factory

See merge request !8605

New endpoints are:

POST :project_id/(issues|merge_requests)/(:issue_id|:merge_request_id)/time_estimate"

POST :project_id/(issues|merge_requests)/(:issue_id|:merge_request_id)/reset_time_estimate"

POST :project_id/(issues|merge_requests)/(:issue_id|:merge_request_id)/add_spent_time"

POST :project_id/(issues|merge_requests)/(:issue_id|:merge_request_id)/reset_spent_time"

GET  :project_id/(issues|merge_requests)/(:issue_id|:merge_request_id)/time_stats"

Resolve "Wrong file size on repository page"

Closes #26773

See merge request !8616

Correct documentation for `data_attribute` method

See merge request !8603

Backport timetracking to CE

See merge request !8195

Fixing typo

See merge request !8621

Fix Compare page throws 500 error when any branch/reference is not selected

Closes #25814

See merge request !8523

Copy commit SHA to clipboard

See merge request !8547

Right now this is a no-op. We're going to add it as a trait argument to
all existing usages of the `:project` factory, so that later we can flip
`:empty_project` to just be `:project`, forcing developers to opt-in to
the slower option when their tests truly require it.

Remove some useless require_relative statements

Closes #26756

See merge request !8609

Correctly keeps merge request tabs in place when editting value in

See merge request !8595

Disable all cops in .rubocop_todo.yml

See merge request !8610

Support `/merge` slash command for MRs

Closes #24915

See merge request !7746

Use cached values to compute total issues count in milestone index pages

See merge request !8518