Story

As a user of RHDH,
I want the Marketplace labels (e.g., titles) to support translations,
so that I can browse and use the Marketplace in my preferred language without confusion.

Background

Currently, Marketplace configurations in dynamic-plugins.default.yaml include hardcoded strings :

red-hat-developer-hub.backstage-plugin-marketplace:
  appIcons:
    - name: marketplace
      importName: MarketplaceIcon
  dynamicRoutes:
    - path: /extensions/catalog
      importName: DynamicMarketplacePluginRouter
  mountPoints:
    - mountPoint: internal.plugins/tab
      importName: DynamicMarketplacePluginContent
      config:
        path: marketplace
        title: Catalog

Here, title: Catalog is not translatable. By introducing titleKey (with fallback to title), we can provide proper i18n support while preserving compatibility with existing configurations.

Acceptance Criteria

• Marketplace supports both title and titleKey in configuration.
• If titleKey is defined → translation is used.
• If titleKey is missing → fallback to title.