Description of problem:

The bulk-import plugin currently defines multiple routes that all load the same
AddRepositoriesPage component:

• /bulk-import → redirects to /bulk-import/repositories
• /bulk-import/repositories/ → AddRepositoriesPage
• /bulk-import/repositories/repositories → AddRepositoriesPage
• /bulk-import/repositories/add → AddRepositoriesPage

This creates unnecessary complexity and confusion. Additionally, there is no handling for undefined paths under /bulk-import/*, which could lead to blank pages.

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Start the bulk-import workspace dev server
2. Navigate to http://localhost:3000/bulk-import
3. Observe redirect to http://localhost:3000/bulk-import/repositories
4. Navigate to http://localhost:3000/bulk-import/repositories/repositories
5. Observe the same AddRepositoriesPage component loads
6. Navigate to http://localhost:3000/bulk-import/repositories/add
7. Observe the same AddRepositoriesPage component loads again
8. Navigate to http://localhost:3000/bulk-import/repositories/some-random-path
9. Observe the Blank page appears

   Actual results:

• Three different URLs load the identical AddRepositoriesPage component
• Undefined paths under /bulk-import/* are not handled (no redirect)
• Route configuration is unnecessarily complex with redundant entries
• addRepositoriesRouteRef is exported but serves no unique purpose

  Expected results:

• Single /bulk-import path loads AddRepositoriesPage
• /bulk-import/import-history/:repoUrl loads ImportHistoryPage
• Any undefined paths under /bulk-import/* redirect to /bulk-import
• Clean route configuration without duplicate entries
• Remove unused addRepositoriesRouteRef from exports

  Reproducibility (Always/Intermittent/Only Once):

  Build Details:

  Additional info (Such as Logs, Screenshots, etc):