OkHttpWebSocketTransport

WebSocket client implementation based on OkHttp.

Features:

• Mature and stable HTTP client library

• Built-in ping/pong heartbeat (pingInterval)

• Better connection pool management

• Client instance is reusable

Usage example:

`WebSocketTransport client = OkHttpWebSocketTransport.create();

WebSocketRequest request = WebSocketRequest.builder("wss://api.example.com/ws")
.header("Authorization", "Bearer token")
.build();

client.connect(request, String.class)
.flatMapMany(conn -> {
conn.send("{\"type\":\"config\"}").subscribe();
return conn.receive();
})
.subscribe(data -> handle(data));
`