Authoring - Conversion to React Query 5

[tonybusa]

This is the parent issue to track the work for frontend-app-authoring in converting to React Query 5.

Summary Checklist

Phase 1: Update Dependencies

Phase 2: Redux → React Query

• Set up QueryClient with defaults
• Create inventory of slices to migrate (sub-issues)
• For each slice:
  • Extract API functions
  • Create query keys factory
  • Create custom hooks
  • Update components
  • Comment out Redux code
  • Write/update tests
  • Validation
    • All tests pass
    • Manual QA complete
    • Performance verified

Phase 3: Cleanup

• Remove deprecated Redux code
• Update documentation
• Team training on new patterns

[bradenmacdonald]

This seems like the same thing as #2540 , but with a bit more of a plan.

[bradenmacdonald]

@tonybusa Actually, I think we can mostly close this in favor of #2540 . I'm not sure if we need @tanstack/react-query-devtools, and the breakdown/examples in #2719 aren't that relevant (e.g. taxonomies is its main example, but it is not using redux and was written to use react query from the start). I think the breakdown in #2540 and the linked examples already provides what we need.