feat(examples): add LemonSlice avatar actions

[rosetta-livekit-bot]

Summary

• Add wave/dance/turn tools for Leila, Jess, and Mr Fox via LemonSlice pose triggers (actions.py)
• Auto-wave on session start and after switching to a motion-capable persona
• Trim persona list from 15 to 9; add Leila and Jess, remove underperforming personas; default to Leila
• Update playground dropdown and README

[changeset-bot]

⚠️ No Changeset found

Latest commit: dfd89e2

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[devin-ai-integration]

Devin Review found 1 potential issue.

View 5 additional findings in Devin Review.

[devin-ai-integration]

🔴 Avatar started before AgentSession.start() causes RoomIO to overwrite avatar audio output

The avatar is started at line 90 (await avatar.start(session, ctx.room)) BEFORE session.start() at line 97. The lemonslice AvatarSession.start() sets agentSession.output.audio = new DataStreamAudioOutput(...) (plugins/lemonslice/src/avatar.ts:255). Then when session.start() runs, it creates a RoomIO which unconditionally overwrites agentSession.output.audio with its own ParticipantAudioOutput (agents/src/voice/room_io/room_io.ts:578-580). The _startImpl warning at agents/src/voice/agent_session.ts:497-501 says "ignoring" but doesn't actually prevent the overwrite.

This means the avatar will never receive audio and won't animate on initial startup. All other avatar examples (trugen_avatar.ts, bey_avatar.ts, lemonslice_realtime_avatar.ts) start the avatar AFTER session.start(), so the avatar's start() correctly overrides RoomIO's output. The persona-switch path (lines 137-138) is unaffected since the session is already started and RoomIO doesn't re-run.

Suggested change

	const avatar = makeAvatar(initial);
	const sessionId = await avatar.start(session, ctx.room);
	const state: State = { persona: initial, avatar, sessionId };
	if (supportsActions(initial.id)) {
	actions.setSession(state.sessionId, initial.id);
	}
	await session.start({
	agent: makeAgent(initial, actions),
	room: ctx.room,
	});
	await session.start({
	agent: makeAgent(initial, actions),
	room: ctx.room,
	});
	const avatar = makeAvatar(initial);
	const sessionId = await avatar.start(session, ctx.room);
	const state: State = { persona: initial, avatar, sessionId };
	if (supportsActions(initial.id)) {
	actions.setSession(state.sessionId, initial.id);
	}

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