feat: add websocket upstream adapter

crates/crank-runtime/src/error.rs

@@ -1,6 +1,7 @@
 use crank_adapter_graphql::GraphqlAdapterError;
 use crank_adapter_grpc::GrpcAdapterError;
 use crank_adapter_rest::RestAdapterError;
+use crank_adapter_websocket::WebsocketAdapterError;
 use crank_core::{ExecutionMode, Protocol};
 use crank_mapping::MappingError;
 use crank_schema::SchemaError;
@@ -18,6 +19,8 @@ pub enum RuntimeError {
     GrpcAdapter(#[from] GrpcAdapterError),
     #[error(transparent)]
     RestAdapter(#[from] RestAdapterError),
+    #[error(transparent)]
+    WebsocketAdapter(#[from] WebsocketAdapterError),
     #[error("protocol {protocol:?} is not supported by runtime")]
     UnsupportedProtocol { protocol: Protocol },
     #[error("operation {operation_id} does not define streaming config")]