Feature/58163 project specific stage administration

[ulferts]

Ticket

https://community.openproject.org/wp/58163

What are you trying to accomplish?

• A new menu is added to the project menu below the "Project settings" labeled "Project lifecycle"
• It looks and behaves similar to the project attributes administration.
  • Individual Toggle
  • Bulk enable/disable
  • Filtering
• To see and access the project administration a permission is required.
  • The permissions is called "Select project stages and gates".
  • Roles having the 'edit project' permission will receive the new permission both when seeding and when migrating.
• Within this administration, all currently existing stages and gates are listed.
  • The name and type (stage/gate) is displayed.
    • The type (rhombus for gate, arrow for stage) are displayed in the color defined for the stage/gate.
  • They are listed in the order defined in the instance's administration.
    • The order cannot be changed.
• The project administrator can activate and deactivate a gate/stage.
• The new functionality is hidden behind the feature flag developed as part of ###58159

Out of scope from the original requirements as of now as it has not been implemented yet:

• Disabled stages/gates will not be displayed:
  • In the overview page
  • In the project list (see ##58160)

Screenshots

Changes of note

• The settings page helpers for specs are split up into individual files. Before, it was possible to go to the various pages by visit_tab!('backlogs'). The menu however no longer uses tabs and adding all the helpers to that one page led to some cluttering in there.
• A component for displaying the type of a life cycle has been added and documented in the lookbook.

Merge checklist

• Added/updated tests
• Added/updated documentation in Lookbook (patterns, previews, etc)
• Tested major browsers (Chrome, Firefox, Edge, ...)

[ulferts]

The failing feature specs are flickering and weren't broken by the changes within this PR.