Add AbstractClient to flipper-frontend-core

Summary: AbstractClient provides basic interaction with Flipper Server and manages plugins

Reviewed By: mweststrate

Differential Revision: D36129750

fbshipit-source-id: 056589666c45821d0af276e3a1572708e0a3b903

desktop/flipper-frontend-core/src/utils/isProduction.tsx

@@ -0,0 +1,14 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {getRenderHostInstance} from '../RenderHost';
+
+export default function isProduction() {
+  return getRenderHostInstance().serverConfig.environmentInfo.isProduction;
+}