Add FabricExample application with the new arch enabled

FabricExample/.bundle/config

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+BUNDLE_PATH: "vendor/bundle"
+BUNDLE_FORCE_RUBY_PLATFORM: 1

FabricExample/.eslintrc.js

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+module.exports = {
+  root: true,
+  extends: '@react-native-community',
+};

FabricExample/.gitignore

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+# OSX
+#
+.DS_Store
+
+# Xcode
+#
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+*.xcuserstate
+ios/.xcode.env.local
+
+# Android/IntelliJ
+#
+build/
+.idea
+.gradle
+local.properties
+*.iml
+*.hprof
+.cxx/
+*.keystore
+!debug.keystore
+
+# node.js
+#
+node_modules/
+npm-debug.log
+yarn-error.log
+
+# fastlane
+#
+# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
+# screenshots whenever they are needed.
+# For more information about the recommended setup visit:
+# https://docs.fastlane.tools/best-practices/source-control/
+
+**/fastlane/report.xml
+**/fastlane/Preview.html
+**/fastlane/screenshots
+**/fastlane/test_output
+
+# Bundle artifact
+*.jsbundle
+
+# Ruby / CocoaPods
+/ios/Pods/
+/vendor/bundle/
+
+# Temporary files created by Metro to check the health of the file watcher
+.metro-health-check*

FabricExample/.prettierrc.js

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+module.exports = {
+  arrowParens: 'avoid',
+  bracketSameLine: true,
+  bracketSpacing: false,
+  singleQuote: true,
+  trailingComma: 'all',
+};

FabricExample/.ruby-version

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+2.7.6

FabricExample/.watchmanconfig

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+{}

FabricExample/App.tsx

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+/**
+ * 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.
+ */
+
+import React, {useCallback, useMemo, useState} from 'react';
+import {
+  Button,
+  Keyboard,
+  SafeAreaView,
+  StyleSheet,
+  Text,
+  TouchableOpacity,
+  View,
+} from 'react-native';
+import Basic from './examples/Basic';
+import Functional from './examples/Functional';
+import GetSetClear from './examples/GetSetClear';
+import MergeItem from './examples/MergeItem';
+
+const SCREENS = {
+  Functional,
+  GetSetClear,
+  MergeItem,
+  Basic,
+};
+
+export default function App(): JSX.Element {
+  const [iteration, setIteration] = useState(0);
+  const [currentTest, setCurrentTest] = useState(SCREENS.Functional);
+
+  const dismissKeyboard = useCallback(Keyboard.dismiss, []);
+  const simulateRestart = useCallback(
+    () => setIteration(iteration + 1),
+    [iteration],
+  );
+  const navigationBar = useMemo(
+    () =>
+      Object.values(SCREENS).map(t => {
+        const {testId, title} = t;
+        return (
+          <Button
+            key={testId}
+            testID={testId}
+            title={title}
+            onPress={() => setCurrentTest(t)}
+          />
+        );
+      }),
+    [],
+  );
+
+  return (
+    <SafeAreaView style={styles.container}>
+      <TouchableOpacity
+        style={styles.closeKeyboardView}
+        onPress={dismissKeyboard}
+        testID="closeKeyboard"
+      />
+      <TouchableOpacity
+        testID="restart_button"
+        onPress={simulateRestart}
+        style={styles.restartButton}
+        activeOpacity={0.6}>
+        <Text>Simulate Restart</Text>
+      </TouchableOpacity>
+
+      <View style={styles.testPickerContainer}>{navigationBar}</View>
+
+      <View
+        testID={`${currentTest.testId}-view`}
+        key={currentTest.title + iteration}
+        style={styles.exampleContainer}>
+        <Text style={styles.exampleTitle}>{currentTest.title}</Text>
+        <Text style={styles.exampleDescription}>{currentTest.description}</Text>
+        <View style={styles.exampleInnerContainer}>{currentTest.render()}</View>
+      </View>
+    </SafeAreaView>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: '#F5FCFF',
+    padding: 8,
+  },
+  exampleContainer: {
+    padding: 4,
+    backgroundColor: '#FFF',
+    borderColor: '#EEE',
+    borderTopWidth: 1,
+    borderBottomWidth: 1,
+    flex: 1,
+  },
+  exampleTitle: {
+    fontSize: 18,
+  },
+  exampleDescription: {
+    color: '#333333',
+    marginBottom: 16,
+  },
+  exampleInnerContainer: {
+    borderColor: '#EEE',
+    borderTopWidth: 1,
+    paddingTop: 10,
+    flex: 1,
+  },
+  restartButton: {
+    padding: 6,
+    borderRadius: 5,
+    backgroundColor: '#F3F3F3',
+    alignItems: 'center',
+    justifyContent: 'center',
+    alignSelf: 'flex-end',
+  },
+  closeKeyboardView: {
+    width: 5,
+    height: 5,
+  },
+  testPickerContainer: {
+    flexDirection: 'row',
+    flexWrap: 'wrap',
+  },
+});

FabricExample/Gemfile

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+source 'https://rubygems.org'
+
+# You may use http://rbenv.org/ or https://rvm.io/ to install and use this version
+ruby File.read(File.join(__dir__, '.ruby-version')).strip
+
+gem 'cocoapods', '~> 1.11', '>= 1.11.3'

FabricExample/Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    CFPropertyList (3.0.6)
+      rexml
+    activesupport (6.1.7.2)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
+    algoliasearch (1.27.5)
+      httpclient (~> 2.8, >= 2.8.3)
+      json (>= 1.5.1)
+    atomos (0.1.3)
+    claide (1.1.0)
+    cocoapods (1.11.3)
+      addressable (~> 2.8)
+      claide (>= 1.0.2, < 2.0)
+      cocoapods-core (= 1.11.3)
+      cocoapods-deintegrate (>= 1.0.3, < 2.0)
+      cocoapods-downloader (>= 1.4.0, < 2.0)
+      cocoapods-plugins (>= 1.0.0, < 2.0)
+      cocoapods-search (>= 1.0.0, < 2.0)
+      cocoapods-trunk (>= 1.4.0, < 2.0)
+      cocoapods-try (>= 1.1.0, < 2.0)
+      colored2 (~> 3.1)
+      escape (~> 0.0.4)
+      fourflusher (>= 2.3.0, < 3.0)
+      gh_inspector (~> 1.0)
+      molinillo (~> 0.8.0)
+      nap (~> 1.0)
+      ruby-macho (>= 1.0, < 3.0)
+      xcodeproj (>= 1.21.0, < 2.0)
+    cocoapods-core (1.11.3)
+      activesupport (>= 5.0, < 7)
+      addressable (~> 2.8)
+      algoliasearch (~> 1.0)
+      concurrent-ruby (~> 1.1)
+      fuzzy_match (~> 2.0.4)
+      nap (~> 1.0)
+      netrc (~> 0.11)
+      public_suffix (~> 4.0)
+      typhoeus (~> 1.0)
+    cocoapods-deintegrate (1.0.5)
+    cocoapods-downloader (1.6.3)
+    cocoapods-plugins (1.0.0)
+      nap
+    cocoapods-search (1.0.1)
+    cocoapods-trunk (1.6.0)
+      nap (>= 0.8, < 2.0)
+      netrc (~> 0.11)
+    cocoapods-try (1.2.0)
+    colored2 (3.1.2)
+    concurrent-ruby (1.2.0)
+    escape (0.0.4)
+    ethon (0.16.0)
+      ffi (>= 1.15.0)
+    ffi (1.15.5)
+    fourflusher (2.3.1)
+    fuzzy_match (2.0.4)
+    gh_inspector (1.1.3)
+    httpclient (2.8.3)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
+    json (2.6.3)
+    minitest (5.17.0)
+    molinillo (0.8.0)
+    nanaimo (0.3.0)
+    nap (1.1.0)
+    netrc (0.11.0)
+    public_suffix (4.0.7)
+    rexml (3.2.5)
+    ruby-macho (2.5.1)
+    typhoeus (1.4.0)
+      ethon (>= 0.9.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    xcodeproj (1.22.0)
+      CFPropertyList (>= 2.3.3, < 4.0)
+      atomos (~> 0.1.3)
+      claide (>= 1.0.2, < 2.0)
+      colored2 (~> 3.1)
+      nanaimo (~> 0.3.0)
+      rexml (~> 3.2.4)
+    zeitwerk (2.6.6)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  cocoapods (~> 1.11, >= 1.11.3)
+
+RUBY VERSION
+   ruby 2.7.6p219
+
+BUNDLED WITH
+   2.1.4

FabricExample/__tests__/App-test.tsx

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+/**
+ * @format
+ */
+
+import 'react-native';
+import React from 'react';
+import App from '../App';
+
+// Note: test renderer must be required after react-native.
+import renderer from 'react-test-renderer';
+
+it('renders correctly', () => {
+  renderer.create(<App />);
+});

FabricExample/_node-version

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+18