river.ts

Type-safe Server-Sent Events (SSE) and WebSocket communication using river.ts library. Use when working with this codebase to: (1) Define typed event schemas with RiverEvents builder, (2) Implement SSE streaming on server with RiverEmitter, (3) Consume SSE streams on client with RiverClient, (4) Handle WebSocket communication with RiverSocketAdapter, (5) Implement request/response RPC patterns over WebSocket, (6) Work with chunked/streamed data events.