Improve the evals "run status" section

[cte]

Description

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Important

Enhance 'run status' section by adding Redis-based status fetching, updating UI components, and restructuring files.

• Behavior:
  • Replaces ConnectionStatus with RunStatus in run.tsx to display task stream, controller, and runners status.
  • Introduces getHeartbeat in heartbeat.ts and getRunners in runners.ts to fetch run status data from Redis.
  • Updates useRunStatus in use-run-status.ts to include heartbeat and runners data.
• File Structure:
  • Renames src/lib/server/exercises.ts, runners.ts, runs.ts, and tasks.ts to src/actions/.
  • Deletes use-exercises.ts and use-runners.ts hooks.
• Misc:
  • Removes --turbopack from dev script in package.json.
  • Minor logging change in sse-stream.ts to ignore errors when writer is already closed.

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[ellipsis-dev]

User-facing labels like 'Task Stream', 'Task Controller', and 'Task Runners' should use translation utilities rather than hardcoded strings.

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