feat: LiveKit OSS Shadcn Components 3

[thomasyuill-livekit]

Summary

Add Agent Session and Chat UI Components to shadcn Package

This PR introduces new components for building agent-based voice/chat interfaces:

Session Management:

• AgentSessionProvider - Combines session context with automatic audio rendering
• StartAudioButton - Handles browser audio autoplay restrictions

Chat UI:

• AgentChatTranscript - Displays conversation messages with user/assistant styling
• AgentChatIndicator - Animated pulsing dot for "thinking" state

Also includes:

• Registry entries for all new components with proper dependencies
• Storybook stories for AgentChatIndicator, AgentChatTranscript, and AgentSessionStartAudioButton
• Updated exports in index.ts
• Introduction.mdx for Storybook
• Update script for building and copying registry to www

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Latest commit: 887cec2

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[github-actions]

size-limit report 📦

Path	Size
LiveKitRoom only	6 KB (0%)
LiveKitRoom with VideoConference	32.46 KB (0%)
All exports	43.3 KB (0%)