chore: bump main examples & lib to use react-native@0.79.3 (#2825)

## Description

Seems that we do not need any library code changes this time. 

### New architecture

* [x] iOS works
* [x] Android seems to build fine

### Old architecture


* [x] iOS works
* [x] Android seems to build fine

### Problems

iOS new arch e2e fails - detox has some issues with reloading the app...

## Changes

See commits.
I've mostly followed react native upgrade helper here + I've added
`.ruby-version` files to our main examples, so that we the lock files
generated by different maintainers are the same.

<!--

## Screenshots / GIFs

Here you can add screenshots / GIFs documenting your change.

You can add before / after section if you're changing some behavior.

### Before

### After

-->

## Test code and steps to reproduce

<!--
Please include code that can be used to test this change and short
description how this example should work.
This snippet should be as minimal as possible and ready to be pasted
into editor (don't exclude exports or remove "not important" parts of
reproduction example)
-->

## Checklist

- [ ] Included code example that can be used to test this change
- [ ] Updated TS types
- [ ] Updated documentation: <!-- For adding new props to native-stack
-->
- [ ]
https://github.com/software-mansion/react-native-screens/blob/main/guides/GUIDE_FOR_LIBRARY_AUTHORS.md
- [ ]
https://github.com/software-mansion/react-native-screens/blob/main/native-stack/README.md
- [ ]
https://github.com/software-mansion/react-native-screens/blob/main/src/types.tsx
- [ ]
https://github.com/software-mansion/react-native-screens/blob/main/src/native-stack/types.tsx
- [ ] Ensured that CI passes

Author: kkafar

Example/.ruby-version

@@ -0,0 +1 @@
+3.4.2

Example/Gemfile

@@ -7,3 +7,9 @@ ruby ">= 2.6.10"
 gem 'cocoapods', '>= 1.13', '!= 1.15.0', '!= 1.15.1'
 gem 'activesupport', '>= 6.1.7.5', '!= 7.1.0'
 gem 'xcodeproj', '< 1.26.0'
+
+# Ruby 3.4.0 has removed some libraries from the standard library.
+gem 'bigdecimal'
+gem 'logger'
+gem 'benchmark'
+gem 'mutex_m'

Example/android/gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

Example/android/gradle/wrapper/gradle-wrapper.properties

@@ -4,22 +4,40 @@ import React_RCTAppDelegate
 import ReactAppDependencyProvider
 
 @main
-class AppDelegate: RCTAppDelegate {
-  override func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
-    self.moduleName = "ScreensExample"
-    self.dependencyProvider = RCTAppDependencyProvider()
-    
-    // You can add your custom initial props in the dictionary below.
-    // They will be passed down to the ViewController used by React Native.
-    self.initialProps = [:]
-    
-    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+class AppDelegate: UIResponder, UIApplicationDelegate {
+  var window: UIWindow?
+
+  var reactNativeDelegate: ReactNativeDelegate?
+  var reactNativeFactory: RCTReactNativeFactory?
+
+  func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil
+  ) -> Bool {
+    let delegate = ReactNativeDelegate()
+    let factory = RCTReactNativeFactory(delegate: delegate)
+    delegate.dependencyProvider = RCTAppDependencyProvider()
+
+    reactNativeDelegate = delegate
+    reactNativeFactory = factory
+
+    window = UIWindow(frame: UIScreen.main.bounds)
+
+    factory.startReactNative(
+      withModuleName: "ScreensExample",
+      in: window,
+      launchOptions: launchOptions
+    )
+
+    return true
   }
-  
+}
+
+class ReactNativeDelegate: RCTDefaultReactNativeFactoryDelegate {
   override func sourceURL(for bridge: RCTBridge) -> URL? {
     self.bundleURL()
   }
-  
+
   override func bundleURL() -> URL? {
 #if DEBUG
     RCTBundleURLProvider.sharedSettings().jsBundleURL(forBundleRoot: "index")
@@ -28,3 +46,4 @@ class AppDelegate: RCTAppDelegate {
 #endif
   }
 }
+