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

custom_home_drawer/analysis_options.yaml

@@ -1,12 +1,7 @@
-# This file configures the analyzer, which statically analyzes Dart code to
-# check for errors, warnings, and lints.
-#
-# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
-# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
-# invoked from the command line by running `flutter analyze`.
+# Lint rules for Flutter apps.
+# See https://dart.dev/guides/language/analysis-options
+include: package:flutter_lints/flutter.yaml
 
-# The following line activates a set of recommended lints for Flutter apps,
-# packages, and plugins designed to encourage good coding practices.
 analyzer:
   exclude:
     - build/**
@@ -16,23 +11,13 @@ analyzer:
     - windows/**
     - macos/**
     - linux/**
-include: package:flutter_lints/flutter.yaml
 
 linter:
-  # The lint rules applied to this project can be customized in the
-  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
-  # included above or to enable additional rules. A list of all available lints
-  # and their documentation is published at
-  # https://dart-lang.github.io/linter/lints/index.html.
-  #
-  # Instead of disabling a lint rule for the entire project in the
-  # section below, it can also be suppressed for a single line of code
-  # or a specific dart file by using the `// ignore: name_of_lint` and
-  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
-  # producing the lint.
   rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
-    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
-
-# Additional information about this file can be found at
-# https://dart.dev/guides/language/analysis-options
+    # 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

custom_home_drawer/lib/screen/home_screen.dart

@@ -1,13 +1,14 @@
 import 'package:flutter/material.dart';
 
 class HomeScreen extends StatefulWidget {
-  const HomeScreen({Key? key}) : super(key: key);
+  const HomeScreen({super.key});
 
   @override
   State<HomeScreen> createState() => _HomeScreenState();
 }
 
-class _HomeScreenState extends State<HomeScreen> with SingleTickerProviderStateMixin {
+class _HomeScreenState extends State<HomeScreen>
+    with SingleTickerProviderStateMixin {
   late final AnimationController _controller = AnimationController(
     vsync: this,
     duration: const Duration(milliseconds: 350),
@@ -18,11 +19,14 @@ class _HomeScreenState extends State<HomeScreen> with SingleTickerProviderStateM
   int _counter = 0;
   bool _canDragged = false;
 
-  void _openCloseDrawer() => _controller.isDismissed ? _controller.forward() : _controller.reverse();
+  void _openCloseDrawer() =>
+      _controller.isDismissed ? _controller.forward() : _controller.reverse();
 
   void _onDragStart(DragStartDetails details) {
-    bool isDragLeft = _controller.isDismissed && details.globalPosition.dx < dragStartPosition;
-    bool isDragRight = _controller.isCompleted && details.globalPosition.dx > dragStartPosition;
+    bool isDragLeft = _controller.isDismissed &&
+        details.globalPosition.dx < dragStartPosition;
+    bool isDragRight = _controller.isCompleted &&
+        details.globalPosition.dx > dragStartPosition;
     _canDragged = isDragLeft || isDragRight;
   }
 
@@ -38,7 +42,8 @@ class _HomeScreenState extends State<HomeScreen> with SingleTickerProviderStateM
       return;
     }
     if (details.velocity.pixelsPerSecond.dx.abs() >= 365) {
-      var visualVelocity = details.velocity.pixelsPerSecond.dx / MediaQuery.of(context).size.width;
+      var visualVelocity = details.velocity.pixelsPerSecond.dx /
+          MediaQuery.of(context).size.width;
       _controller.fling(velocity: visualVelocity);
     } else if (_controller.value < 0.5) {
       _controller.reverse();
@@ -66,9 +71,9 @@ class _HomeScreenState extends State<HomeScreen> with SingleTickerProviderStateM
               _homeDrawer(context),
               Transform(
                 transform: Matrix4.identity()
-                  ..translate(slide)
+                  ..translateByDouble(slide, 0, 0, 1)
                   ..rotateZ(rotate)
-                  ..scale(scale),
+                  ..scaleByDouble(scale, scale, scale, 1),
                 alignment: Alignment.centerLeft,
                 child: _homeView(context),
               )

custom_home_drawer/pubspec.yaml

@@ -20,7 +20,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.18.2 <3.0.0'
+  sdk: ">=3.0.0 <4.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions