fix: remove get package, upgrade Flutter 3.44 compat deps

- Remove `get` package (incompatible with Flutter 3.44/Dart 3.12 due to
  removed ThemeData.backgroundColor and final IconData class)
- Replace GetMaterialApp → MaterialApp with GlobalKey navigatorKey
- Convert AuthenticationRepository and all 7 controllers from
  GetxController to plain singletons
- Replace Get.snackbar/offAll/to/back/defaultDialog with app_navigator
  helpers and native Flutter APIs
- Add ApiService.baseUrl static + parseJson method
- Add UserModel.getUser static method
- Add UserProvider.score via ScoresModel API
- Fix user?.photo → user?.picture in drawer_menu, service_after
- Fix logout(uid!) → logout() in drawer_menu
- Fix photo_view_web.dart missing dart:typed_data import
- Remove getCoordsOfCity call from ubicacion.dart
- Fix UserModel.getUser?.name null-safety in map/service.dart
- Upgrade: google_maps_flutter ^2.9.0, url_launcher ^6.3.0,
  font_awesome_flutter ^10.8.0, image_picker ^1.1.2

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/src/presentation/screens/new_number.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:get/get.dart';
 import 'package:intl_phone_field/intl_phone_field.dart';
 import 'package:prosappco/src/components/pop_appbar.dart';
 import 'package:prosappco/src/components/primary_btn.dart';
@@ -14,7 +13,7 @@ class NewNumberScreen extends StatefulWidget {
 }
 
 class _NewNumberScreenState extends State<NewNumberScreen> {
-  final controller = Get.put(NewPhoneController());
+  final controller = NewPhoneController.instance;
   String completePhoneNumber = '';
   final _formKey = GlobalKey<FormState>();