feat: add websocket upstream adapter

apps/ui/js/wizard.js

@@ -1,6 +1,6 @@
 var currentStep = 1;
 var TOTAL_STEPS = 5;
-var wizardProtocol = 'rest'; // 'rest' | 'graphql' | 'grpc'
+var wizardProtocol = 'rest'; // 'rest' | 'graphql' | 'grpc' | 'websocket'
 var wizardMode   = 'create'; // 'create' | 'edit'
 var wizardEditId = null;
 var wizardWorkspaceId = null;
@@ -32,6 +32,10 @@ function defaultProtocolCapabilities() {
       supports_execution_modes: ['unary', 'window', 'session', 'async_job'],
       supports_transport_behaviors: ['request_response', 'server_stream'],
     },
+    websocket: {
+      supports_execution_modes: ['window', 'session', 'async_job'],
+      supports_transport_behaviors: ['server_stream', 'stateful_session', 'deferred_result'],
+    },
   };
 }