gRPC-WebSocket Proxy Client

Connects browser JavaScript to gRPC services via a WebSocket proxy server (v0.3.1). Requires a running GRPC Bus WebSocket Proxy Server. Differentiates from other gRPC-Web libraries by using raw WebSockets instead of HTTP/2, enabling simple proxy setups. Release cadence is low; last release was 2018. Supports standard gRPC unary calls with proto file/service mapping.