feat(hume): add Hume AI TTS plugin

[adrivelasco]

Summary

• Add new @livekit/agents-plugin-hume package implementing Hume AI TTS (Octave model)
• Non-streaming synthesis via Hume's /v0/tts/stream/json endpoint with PCM output format
• Supports voice selection (by name or ID), instant mode, speed control, trailing silence, and context utterances

Test plan

• Verify pnpm build succeeds
• Verify pnpm lint passes
• Run TTS test with HUME_API_KEY set: pnpm test -- --testPathPattern=plugins/hume
• Test in Agent Playground with a basic voice agent using Hume TTS

🤖 Generated with Claude Code

[changeset-bot]

🦋 Changeset detected

Latest commit: f3453cf

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 29 packages

Name	Type
@livekit/agents-plugin-hume	Major
@livekit/agents	Major
@livekit/agents-plugin-anam	Major
@livekit/agents-plugin-assemblyai	Major
@livekit/agents-plugin-baseten	Major
@livekit/agents-plugin-bey	Major
@livekit/agents-plugin-cartesia	Major
@livekit/agents-plugin-cerebras	Major
@livekit/agents-plugin-deepgram	Major
@livekit/agents-plugin-elevenlabs	Major
@livekit/agents-plugin-google	Major
@livekit/agents-plugin-hedra	Major
@livekit/agents-plugin-inworld	Major
@livekit/agents-plugin-lemonslice	Major
@livekit/agents-plugin-liveavatar	Major
@livekit/agents-plugin-livekit	Major
@livekit/agents-plugin-minimax	Major
@livekit/agents-plugin-mistral	Major
@livekit/agents-plugin-neuphonic	Major
@livekit/agents-plugin-openai	Major
@livekit/agents-plugin-phonic	Major
@livekit/agents-plugin-resemble	Major
@livekit/agents-plugin-rime	Major
@livekit/agents-plugin-runway	Major
@livekit/agents-plugin-sarvam	Major
@livekit/agents-plugin-silero	Major
@livekit/agents-plugin-trugen	Major
@livekit/agents-plugin-xai	Major
@livekit/agents-plugins-test	Major

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[toubatbrian]

@adrivelasco have you tested if it is working locally in an agent session?

[adrivelasco]

@toubatbrian yes, it worked for me as I had to make my agent working with hume.ai TTS. I didn't notice I can add examples, let me add one though.

[CLAassistant]

All committers have signed the CLA.

[adrivelasco]

@toubatbrian added an example and worked locally with the agents playground.