[VoiceLive] Initial Preview of the VoiceLive SDK

[xitzhang]

Description

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• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull Request Overview

This PR introduces the initial VoiceLive SDK for Java, implementing a WebSocket-based real-time voice interaction API with support for bidirectional audio streaming, function calling, and avatar integration.

Key Changes:

• Generated TypeSpec-based model classes for session management, conversation handling, and response processing
• Support for server VAD (Voice Activity Detection) and turn detection
• JSON serialization/deserialization for all model types with discriminated polymorphic handling
• Comprehensive event type system for server-client communication

Reviewed Changes

Copilot reviewed 130 out of 175 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
SessionUpdate.java	Base class for polymorphic server events with custom discriminator handling using JsonReaderHelper
SessionResponse.java	Response model containing output items, usage statistics, and configuration
SessionResponseItem.java	Polymorphic base for conversation items (messages, function calls)
ResponseStatusDetails.java	Polymorphic base for response status with discriminated subtypes (failed, incomplete, cancelled)
Various SessionUpdate* classes	Concrete event types for audio, transcription, animation, and conversation updates
ServerEventType.java	Enum defining all possible server event discriminator values
ServerVadTurnDetection.java	VAD configuration for automatic turn detection
assets.json	Asset repository configuration for test resources

[xitzhang]

linked to API view approval: https://spa.apiview.dev/review/c8cee54dfb664a41b3bd132f7fc95d7c?activeApiRevisionId=8cd88b8380134b74a6674d024f4e49f6

[JonathanGiles]

Approving for first preview release