Add experimental iOS support (#166)

# Why

Since Xcode 14 has deprecated BitCode, it is a good time to revisit iOS support.

# How

- v8-ios now delivers xcframework
- add ios autolinking and fix launch crash from the default `freeze_flags_after_init` v8 flag
- remove deprecated `react-native-template-v8`
- add expo config-plugin support for ios

# Test Plan

```sh
$ yarn create expo-app sdk48
$ cd sdk48
$ npx expo install react-native-v8 v8-ios
$ npx expo run:ios 
```

Author: Kudo

README.md

@@ -8,6 +8,7 @@ This project aims to support V8 replacement runtime for React Native. Designed a
 > **Note** From react-native-v8 2.0, the minimum requirement for react-native is 0.71.2.
 
 For earlier versions, please check out the older readmes.
+
 - [react-native>=0.66.0 readme](https://github.com/Kudo/react-native-v8/blob/1.0-stable/README.md)
 - [react-native<0.66.0 readme](https://github.com/Kudo/react-native-v8/blob/0.67-stable/README.md)
 
@@ -16,12 +17,12 @@ For earlier versions, please check out the older readmes.
 For managed projects, you can install through the single command:
 
 ```sh
-$ expo install react-native-v8 v8-android-jit
+$ npx expo install react-native-v8 v8-android-jit
 ```
 
 - Please make sure you have [`"android.jsEngine": "jsc"`](https://docs.expo.dev/versions/latest/config/app/#jsengine-2).
 
-For bare projects, you can run `expo prebuild -p android --clean` after the installation to prebuild again.
+For bare projects, you can run `npx expo prebuild -p android --clean` after the installation to prebuild again.
 
 ## Installation for React Native >= 0.71
 
@@ -133,10 +134,19 @@ For detailed V8 features, please check [the v8-android-buildscripts feature flag
 | `v8-android`            | No  | Yes  |
 | `v8-android-nointl`     | No  | No   |
 
-## iOS Support (Experimented)
+## iOS Support (Experimental)
+
+You could try the experimental ios support on an Expo project which SDK version is greater or equal to 48.
+
+For managed projects, you can install through the single command:
+
+```sh
+$ npx expo install react-native-v8 v8-ios
+```
+
+- Please make sure you have [`"ios.jsEngine": "jsc"`](https://docs.expo.dev/versions/latest/config/app/#jsengine-1).
 
-We did have experimented iOS support. To adopt V8 for Xcodeproj gets a little complicated, so we have a pre-shaped template.
-Please check [react-native-template-v8](packages/react-native-template-v8/README.md) for more information.
+For bare projects, you can run `npx expo prebuild -p ios --clean` after the installation to prebuild again.
 
 ## FAQ
 

RNV8.podspec

@@ -0,0 +1,42 @@
+require 'json'
+
+package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
+
+reactNativeVersion = '0.0.0'
+begin
+  reactNativeVersion = `node --print "require('react-native/package.json').version"`
+rescue
+  reactNativeVersion = '0.0.0'
+end
+if ENV["REACT_NATIVE_OVERRIDE_VERSION"]
+  reactNativeVersion = ENV["REACT_NATIVE_OVERRIDE_VERSION"]
+end
+reactNativeTargetVersion = reactNativeVersion.split('.')[1].to_i
+
+folly_compiler_flags = '-DFOLLY_NO_CONFIG -DFOLLY_MOBILE=1 -DFOLLY_USE_LIBCPP=1 -Wno-comma -Wno-shorten-64-to-32'
+
+Pod::Spec.new do |s|
+  s.name        = 'RNV8'
+  s.version     = package['version']
+  s.summary     = package['description']
+  s.description = package['description']
+  s.license     = package['license']
+  s.author      = package['author']
+  s.homepage    = package['homepage']
+  s.platform    = :ios, '13.0'
+
+  s.source      = { git: 'https://github.com/Kudo/react-native-v8.git' }
+  s.source_files = 'src/v8runtime/**/*.{h,cpp}', 'src/iosexecutor/**/*.{h,cpp,m,mm}'
+
+  s.pod_target_xcconfig = {
+    'CLANG_CXX_LANGUAGE_STANDARD' => 'c++17',
+    'HEADER_SEARCH_PATHS' => "\"$(PODS_ROOT)/boost\"",
+  }
+
+  compiler_flags = folly_compiler_flags + ' ' + "-DREACT_NATIVE_TARGET_VERSION=#{reactNativeTargetVersion}"
+  s.compiler_flags = compiler_flags
+
+  s.dependency 'v8-ios'
+  s.dependency 'React-Core'
+  s.dependency 'React-cxxreact'
+end

package.json

@@ -18,6 +18,7 @@
     "android",
     "v8"
   ],
+  "author": "Kudo Chien",
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/Kudo/react-native-v8/issues"