Story

As a user of RHDH,
I want the Global Header labels (e.g., menu items, profile links, application launcher items) coming from configuration to be translatable,
so that I can view them in my preferred language and have a consistent localized experience across the platform.

Background

Currently, strings such as title: Self-service, title: Developer Hub, and title: Settings are hardcoded in dynamic-plugins.default.yaml.
This prevents them from being properly localized. By introducing translation support (titleKey + fallback mechanism), we ensure these values can be managed through i18n without breaking existing configurations.
Below configuration have labels

- mountPoint: global.header/component
  importName: HeaderIconButton
  config:
    priority: 90
    props:
      title: Self-service

- mountPoint: global.header/application-launcher
  importName: MenuItemLink
  config:
    section: Documentation
    priority: 150
    props:
      title: Developer Hub

- mountPoint: global.header/application-launcher
  importName: MenuItemLink
  config:
    section: Developer Tools
    priority: 100
    props:
      title: RHDH Local

- mountPoint: global.header/profile
  importName: MenuItemLink
  config:
    priority: 100
    props:
      title: Settings

- mountPoint: global.header/profile
  importName: MenuItemLink
  config:
    priority: 90
    props:
      title: My profile
      

Acceptance Criteria

• Global Header supports both title (string) and titleKey (translation reference).
• When titleKey is defined → translated string is displayed.
• When titleKey is missing → fallback to title value.