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

navigation_drawer/lib/screens/account.dart

@@ -3,6 +3,8 @@ import 'package:flutter/material.dart';
 class AccountScreen extends StatelessWidget {
   static const String routeName = "/account";
 
+  const AccountScreen({super.key});
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(

navigation_drawer/lib/screens/home.dart

@@ -3,6 +3,8 @@ import 'package:navigation_drawer/screens/account.dart';
 import 'package:navigation_drawer/screens/settings.dart';
 
 class HomeScreen extends StatefulWidget {
+  const HomeScreen({super.key});
+
   @override
   HomeScreenState createState() => HomeScreenState();
 }
@@ -11,11 +13,11 @@ class HomeScreenState extends State<HomeScreen> {
   Drawer getNavDrawer(BuildContext context) {
     var headerChild = DrawerHeader(child: Text("Header"));
     var aboutChild = AboutListTile(
-        child: Text("About"),
         applicationName: "Application Name",
         applicationVersion: "v1.0.0",
         applicationIcon: Icon(Icons.adb),
-        icon: Icon(Icons.info));
+        icon: Icon(Icons.info),
+        child: Text("About"));
 
     ListTile getNavItem(var icon, String s, String routeName) {
       return ListTile(

navigation_drawer/lib/screens/settings.dart

@@ -3,6 +3,8 @@ import 'package:flutter/material.dart';
 class SettingsScreen extends StatelessWidget {
   static const String routeName = "/settings";
 
+  const SettingsScreen({super.key});
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(