Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/16950
FF issue: https://gitlab.com/gitlab-org/gitlab/-/issues/324159

We apply syntax highlighting to old and new versions of the whole
file. However, we need to highlight only diff lines.

This change should optimize this process. Here we provide only
necessary diff lines to the syntax highlighter.

Threat Insights group data dictionary updates

See merge request gitlab-org/gitlab!56686

Store MarkerRanges in Gitlab::Diff::Line objects [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!56361

Create Cop to enforce using policies framework for administrators

See merge request gitlab-org/gitlab!55693

Improve the perfomance of finding cancelable pipelines for users

See merge request gitlab-org/gitlab!56314

It improves the performance of the query that searches for cancelable
pipelines for a given user.

Swap custom store for vuex implementation in merge_conflicts

See merge request gitlab-org/gitlab!56756

- wire vuex in bundle and main app
- remove custom store

Move from btn-success to btn-confirm in projects/hooks directory

See merge request gitlab-org/gitlab!56334

Add sorting functionality to Vue issues list page

See merge request gitlab-org/gitlab!56754

This MR adds sorting functionality to the Vue issues list page,
which is under the feature flag `vue_issues_list` defaulted to off.

Ignore hidden lists when listing epic board lists [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!56338

Move from btn-success to btn-confirm in projects/deploy_keys directory

See merge request gitlab-org/gitlab!56331

Move from btn-success to btn-confirm in projects/protected_tags directory

See merge request gitlab-org/gitlab!56478

Move from btn-success to btn-confirm in projects/protected_branches directory

See merge request gitlab-org/gitlab!56477

Change inconsistent capitalization

See merge request gitlab-org/gitlab!56580

Create DAST scan schedule documentation

See merge request gitlab-org/gitlab!56277

- Incorporate changes from
  https://gitlab.com/gitlab-org/gitlab/-/merge_requests/54342

Swimlanes - Optimize/split queries

See merge request gitlab-org/gitlab!56810

Allow to filter board epic lists

See merge request gitlab-org/gitlab!56026

Move from btn-success to btn-confirm in projects/branches directory

See merge request gitlab-org/gitlab!56325

Move from btn-success to btn-confirm in projects/cleanup directory

See merge request gitlab-org/gitlab!56329

Resolve Layout/BeginEndAlignment rubocop offenses

See merge request gitlab-org/gitlab!56827

Resolves auto-correctable Rubocop offenses

[ci skip]

[ci skip]

Update changelog docs for feature flag

See merge request gitlab-org/gitlab!56519

Allow to filter epics from epic lists on GraphQL

Add note about agentk version to one-liner install instructions

See merge request gitlab-org/gitlab!56050

Add docs for changing default branch name on existing repos

See merge request gitlab-org/gitlab!56258

The information about default branches is about to become very
important; start carving it off into its own page.

Set up markdown processing tests for the content editor

See merge request gitlab-org/gitlab!55856

It creates a test that ensures the Content Editor knows
how to process the HTML Output of the Markdown API
and generate the exact original Markdown that the Markdown API
received as input in the first place.