feat(cli): speech-to-text v1 — detect-entities

[claude]

Adds the detect-entities recipe for speech-to-text v1 (cli).

Closes part of #215

[github-actions]

✅ CLI Recipe Tests

── recipes/cli/speech-to-text/v1/detect-entities ──
PASS
jq error: jq: error (at <stdin>:0): Cannot iterate over null (null)
{
  "status": "error",
✓ PASSED