Put back the new project button

Closes #27354

See merge request !9426

Fix access to projects shared with a nested group

Closes #28787

See merge request !9565

Ignore builds dir when run rubocop check

See merge request !9580

Merge branch '28769-raise-custom-exception-in-all-methods-of-mergeservice-that-want-to-inform-the-user' into 'master'

Use exceptions for MergeService error handling

Closes #28769

See merge request !9576

Return 204 on all DELETE endpoints

Closes #20429

See merge request !9397

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

If any method called by `MergeService#execute` raises a `MergeError`,
that error's message will be logged, the model will be updated, and the
merge will fail.

Clarify when to create EE compatibility MR in code review process

See merge request !9575

Only create unmergeable todos once

Closes #28555

See merge request !9513

Fix migration without DOWNTIME clause specified

See merge request !9571

Make RuboCop happy

See merge request !9554

Add button to create issue for failing build

Closes #25920

See merge request !9391

Fix inline comment images by removing wrapper #20890

Closes #20890

See merge request !5804

Fix broken dev environment in master

See merge request !9557

Keep consistent in handling indexOf results

Closes #28723

See merge request !9531

Add development fixtures for nested groups

See merge request !9553

Replace setInterval with setTimeout to prevent highly frequent requests

Closes #28212

See merge request !9271

[ci skip]

Fix #27840 - Improve the search bar experience on mobile

Closes #27840

See merge request !9280

[ci skip]

Removed jQuery UI draggable

See merge request !8582

Fix webpack dev server when behind proxy

See merge request !9543

[ci skip]

Minor refactoring of Uploaders

See merge request !9490

Align last column buttons with new environment button

Closes #28753

See merge request !9551

Updates SSH key title after pasting key

Closes #28436

See merge request !9481

Add Mock CI service/integration

See merge request !9250