refactor: standardize Dart and Android config across all 54 apps

- Bump all apps to sdk >=3.0.0 <4.0.0 and add flutter_lints + a shared
  analysis_options.yaml to every app (flutter analyze is now green repo-wide)
- Fix real compile errors in firebase_google_authentication and image_editor,
  plus deprecated APIs (Matrix4, SvgPicture.color, textScaleFactor),
  missing async 'mounted' guards, and misc lints via dart fix + manual fixes
- Align pubspec 'name' with each folder and Android namespace/applicationId
  with the documented github.nisrulz.* convention
- Convert bmi_calculator from a legacy Flutter module to a standard app
  with a proper android/ scaffold; fix missing android:exported in launcher
  manifests across 22 apps so all Android builds pass
- Untrack generated build files (GeneratedPluginRegistrant,
  .flutter-plugins-dependencies) and ignore them

todo_list_using_provider/analysis_options.yaml

@@ -0,0 +1,23 @@
+# Lint rules for Flutter apps.
+# See https://dart.dev/guides/language/analysis-options
+include: package:flutter_lints/flutter.yaml
+
+analyzer:
+  exclude:
+    - build/**
+    - android/**
+    - ios/**
+    - web/**
+    - windows/**
+    - macos/**
+    - linux/**
+
+linter:
+  rules:
+    # Noise in small sample apps; keep the code readable.
+    avoid_print: false
+    avoid_unnecessary_containers: false
+    file_names: false
+    library_private_types_in_public_api: false
+    non_constant_identifier_names: false
+    strict_top_level_inference: false

todo_list_using_provider/android/app/build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 }
 
 android {
-    namespace = "cu.makkura.flutter_new_provider_todo"
+    namespace = "github.nisrulz.todo_list_using_provider"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
@@ -16,7 +16,7 @@ android {
     }
 
     defaultConfig {
-        applicationId = "cu.makkura.flutter_new_provider_todo"
+        applicationId = "github.nisrulz.todo_list_using_provider"
         minSdk = flutter.minSdkVersion
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode

todo_list_using_provider/android/app/src/debug/AndroidManifest.xml

@@ -1,5 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="cu.makkura.flutter_new_provider_todo">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->

todo_list_using_provider/android/app/src/main/AndroidManifest.xml

@@ -11,6 +11,7 @@
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name="io.flutter.embedding.android.FlutterActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"

todo_list_using_provider/android/app/src/profile/AndroidManifest.xml

@@ -1,5 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="cu.makkura.flutter_new_provider_todo">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->

todo_list_using_provider/lib/main.dart

@@ -9,6 +9,8 @@ void main() {
 }
 
 class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
   // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {

todo_list_using_provider/lib/models/todo.dart

@@ -9,7 +9,7 @@ class Todo extends ChangeNotifier {
 
   /// Toggles the value of the item and notify to listeners
   void toggle() {
-    this.done = !this.done;
+    done = !done;
     notifyListeners();
   }
 }

todo_list_using_provider/lib/notifiers/todo_list.dart

@@ -1,25 +1,25 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter_new_provider_todo/models/todo.dart';
+import 'package:todo_list_using_provider/models/todo.dart';
 
 /// This class represents a model
 /// that notify listeners when it has some changes
 class TodoList extends ChangeNotifier {
-  List<Todo> _list = [];
+  final List<Todo> _list = [];
 
   List<Todo> get list => _list;
 
   void add(Todo newItem) {
-    this._list.add(newItem);
+    _list.add(newItem);
     notifyListeners();
   }
 
   void remove(Todo removedItem) {
-    this._list.remove(removedItem);
+    _list.remove(removedItem);
     notifyListeners();
   }
 
   void clearDoneItems() {
-    this._list.removeWhere((Todo element) => element.done);
+    _list.removeWhere((Todo element) => element.done);
     notifyListeners();
   }
 }

todo_list_using_provider/lib/widgets/add_button.dart

@@ -5,6 +5,8 @@ import '../models/todo.dart';
 import '../notifiers/todo_list.dart';
 
 class AddButton extends StatelessWidget {
+  const AddButton({super.key});
+
   @override
   Widget build(BuildContext context) {
     final todoList = Provider.of<TodoList>(context, listen: false);
@@ -13,7 +15,7 @@ class AddButton extends StatelessWidget {
     return FloatingActionButton(
       onPressed: () {
         todoList.add(
-          new Todo(id: '${todoList.list.length}', title: 'tituloTodo${todoList.list.length}')
+          Todo(id: '${todoList.list.length}', title: 'tituloTodo${todoList.list.length}')
         );
       },
       tooltip: 'Increment',

todo_list_using_provider/lib/widgets/todo_list_item_display.dart

@@ -4,6 +4,8 @@ import 'package:provider/provider.dart';
 import '../models/todo.dart';
 
 class TodoListItemDisplay extends StatelessWidget {
+  const TodoListItemDisplay({super.key});
+
   @override
   Widget build(BuildContext context) {
     print('rebuilding Todo List Item Display');

todo_list_using_provider/lib/widgets/todo_list_item_toggle_button.dart

@@ -4,6 +4,8 @@ import 'package:provider/provider.dart';
 import '../models/todo.dart';
 
 class TodoListItemToggleButton extends StatelessWidget {
+  const TodoListItemToggleButton({super.key});
+
   @override
   Widget build(BuildContext context) {
     print('build Toggle Item Button');

todo_list_using_provider/lib/widgets/todo_list_item_wdt.dart

@@ -5,11 +5,13 @@ import 'todo_list_item_toggle_button.dart';
 
 
 class TodoListItemWdt extends StatelessWidget {
+  const TodoListItemWdt({super.key});
+
   @override
   Widget build(BuildContext context) {
     print('rebuilding ToDo List Item: ');
 
-    return new Row(
+    return Row(
       mainAxisAlignment: MainAxisAlignment.spaceAround,
       children: [
         TodoListItemDisplay(),

todo_list_using_provider/lib/widgets/todo_list_wdt.dart

@@ -6,6 +6,8 @@ import '../notifiers/todo_list.dart';
 import '../widgets/todo_list_item_wdt.dart';
 
 class TodoListWdt extends StatelessWidget {
+  const TodoListWdt({super.key});
+
   @override
   Widget build(BuildContext context) {
     print('building Todo List Wdt');
@@ -20,7 +22,7 @@ class TodoListWdt extends StatelessWidget {
           itemBuilder: (context, index) {
             return ChangeNotifierProvider<Todo>(
                 create: (context) => todoList.list[index],
-                child: new TodoListItemWdt()
+                child: TodoListItemWdt()
             );
           },
         );

todo_list_using_provider/pubspec.yaml

@@ -1,4 +1,4 @@
-name: flutter_new_provider_todo
+name: todo_list_using_provider
 description: A new Flutter project.
 
 # The following line prevents the package from being accidentally published to
@@ -33,6 +33,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  flutter_lints: ^6.0.0
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec