Add GrpcConfig class following the pattern from ApiClientConfig with:
- Development config: 192.168.88.228:5011 (plaintext/insecure)
- Production config: grpc-route.goutezplanb.com:443 (TLS)
- Host, port, timeout, useTls, and allowSelfSignedCertificate properties
- Address getter for convenience
Co-Authored-By: Claude <noreply@anthropic.com>
