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

[claude]

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

Closes part of #231

[github-actions]

✅ CLI Recipe Tests

── recipes/cli/speech-to-text/v1/detect-language ──
PASS
"Detected: en\nTranscript: yeah as as much as it's worth celebrating the first 
spacewalk with an all female team i think many of us are looking for"
{
✓ PASSED