Fast refresh

Summary:
This diff enables optional [Fast Refresh](https://reactnative.dev/docs/fast-refresh) for Flipper in dev mode. It can be opted-in using additional argument "--fast-refresh": `yarn start --fast-refresh`. I've copy-pasted the most part of implementation from React Native with some minor changes.

I made this optional for now as it works not ideally. In most cases which I checked it works fine, however for some files it falls back to full refresh (e.g. when `desktop/plugins/network/index.tsx` changed) and sometimes doesn't refresh content even after change detected and re-compiled (e.g. when `src/ui/components/searchable/Searchable.tsx` is changed, Network plugin which is dependent on it is not refreshed automatically).

State from redux is restored after fast refresh, but local state in class-based components is cleared. For function-based components local state is also stored, so it's an additional point to make plugins components functional :)

Also, for now there is no UI for Fast Refresh (loading indicator etc), information is just logged to console.

Changelog: Experimental support for Fast Refresh in dev mode can be enabled by `yarn start --fast-refresh`.

Reviewed By: jknoxville

Differential Revision: D20993073

fbshipit-source-id: 65632788df105a85fac0b924b7808120900b349e

desktop/app/src/init-fast-refresh.js

@@ -0,0 +1,52 @@
+/**
+ * Copyright (c) Facebook, Inc. and its 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 {default as HmrClient} from './HMRClient';
+import {default as ReactRefreshRuntime} from 'react-refresh/runtime';
+
+HmrClient.setup(
+  'web',
+  '/src/init-fast-refresh.bundle',
+  'localhost',
+  '3000',
+  true,
+);
+
+ReactRefreshRuntime.injectIntoGlobalHook(window);
+
+const Refresh = {
+  performFullRefresh(reason) {
+    console.log('Perform full refresh', reason);
+    window.location.reload();
+  },
+
+  createSignatureFunctionForTransform:
+    ReactRefreshRuntime.createSignatureFunctionForTransform,
+
+  isLikelyComponentType: ReactRefreshRuntime.isLikelyComponentType,
+
+  getFamilyByType: ReactRefreshRuntime.getFamilyByType,
+
+  register: ReactRefreshRuntime.register,
+
+  performReactRefresh() {
+    if (ReactRefreshRuntime.hasUnrecoverableErrors()) {
+      console.error('Fast refresh - Unrecolverable');
+      window.location.reload();
+      return;
+    }
+    ReactRefreshRuntime.performReactRefresh();
+    console.log('Perform react refresh');
+  },
+};
+
+require.Refresh = Refresh;
+
+// eslint-disable-next-line import/no-commonjs
+require('./init.tsx');