exports

[dinmukhamedm]

• Exports of eval results (as csv) and datasets (as JSON)
• Fix to labeling queues behaviour
• Allow managing seats on a paid tier

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[!IMPORTANT] This pull request adds dataset and evaluation result exports, improves subscription seat management, and fixes labeling queue behavior.

• Exports:
  • Add CSV export for evaluation results in frontend/app/api/projects/[projectId]/evaluations/[evaluationId]/download/route.ts.
  • Add JSON export for datasets in frontend/app/api/projects/[projectId]/datasets/[datasetId]/download/route.ts.
• Subscription Management:
  • Add seats_included_in_tier to WorkspaceStats in app-server/src/db/stats.rs.
  • Change add_seats to set_seats in app-server/src/db/subscriptions.rs.
  • Update subscription handling in frontend/app/api/workspaces/[workspaceId]/update-seats/route.ts.
  • Update Stripe integration in frontend/app/checkout/page.tsx and frontend/app/checkout/portal/page.tsx.
• Labeling Queues:
  • Fix labeling queue behavior in frontend/app/api/projects/[projectId]/queues/[queueId]/remove/route.ts.
  • Update label management in frontend/components/queue/labels.tsx and frontend/components/queue/queue.tsx.
• Miscellaneous:
  • Add DownloadButton component in frontend/components/ui/download-button.tsx.
  • Update email notifications for subscription updates in frontend/lib/emails/utils.ts.

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