[MOB-12516] Fix zone mismatch issue (#376)

* fix(initialization): fix zone mismatch issue in initialization code

* fix(initilization): fix the PR comments

Author: asamiz

README.md

@@ -22,7 +22,6 @@ A Flutter plugin for [Instabug](https://instabug.com/).
 
 ### Installation
 
-
 1. Add Instabug to your `pubspec.yaml` file.
 
 ```yaml
@@ -65,18 +64,23 @@ Instabug automatically captures every crash of your app and sends relevant detai
 
 ```dart
 void main() {
-  WidgetsFlutterBinding.ensureInitialized();
-
-  Instabug.init(
-    token: 'APP_TOKEN',
-    invocationEvents: [InvocationEvent.floatingButton],
+  runZonedGuarded(
+    () {
+      WidgetsFlutterBinding.ensureInitialized();
+
+      Instabug.init(
+        token: 'APP_TOKEN',
+        invocationEvents: [InvocationEvent.shake],
+      );
+
+      FlutterError.onError = (FlutterErrorDetails details) {
+        Zone.current.handleUncaughtError(details.exception, details.stack!);
+      };
+
+      runApp(MyApp());
+    },
+    CrashReporting.reportCrash,
   );
-
-  FlutterError.onError = (FlutterErrorDetails details) {
-    Zone.current.handleUncaughtError(details.exception, details.stack!);
-  };
-
-  runZonedGuarded(() => runApp(MyApp()), CrashReporting.reportCrash);
 }
 ```
 
@@ -90,7 +94,6 @@ Repro Steps list all of the actions an app user took before reporting a bug or c
   ));
   ```
 
-
 ## Network Logging
 You can choose to attach all your network requests to the reports being sent to the dashboard. To enable the feature when using the `dart:io` package `HttpClient`, please refer to the [Instabug Dart IO Http Client](https://github.com/Instabug/instabug-dart-io-http-client) repository.
 

example/lib/main.dart

@@ -4,21 +4,23 @@ import 'package:flutter/material.dart';
 import 'package:instabug_flutter/instabug_flutter.dart';
 
 void main() {
-  WidgetsFlutterBinding.ensureInitialized();
+  runZonedGuarded(
+    () {
+      WidgetsFlutterBinding.ensureInitialized();
 
-  Instabug.init(
-    token: 'ed6f659591566da19b67857e1b9d40ab',
-    invocationEvents: [InvocationEvent.floatingButton],
-    debugLogsLevel: LogLevel.verbose,
-  );
-
-  Instabug.setWelcomeMessageMode(WelcomeMessageMode.disabled);
+      Instabug.init(
+        token: 'ed6f659591566da19b67857e1b9d40ab',
+        invocationEvents: [InvocationEvent.floatingButton],
+      );
 
-  FlutterError.onError = (FlutterErrorDetails details) {
-    Zone.current.handleUncaughtError(details.exception, details.stack!);
-  };
+      FlutterError.onError = (FlutterErrorDetails details) {
+        Zone.current.handleUncaughtError(details.exception, details.stack!);
+      };
 
-  runZonedGuarded(() => runApp(MyApp()), CrashReporting.reportCrash);
+      runApp(MyApp());
+    },
+    CrashReporting.reportCrash,
+  );
 }
 
 class MyApp extends StatelessWidget {