Migrate fires_flutter to flutter_map v6.1.0 and complete major null-safety fixes

- Updated Android build files: gradle plugin 8.2.2, gradle 8.3, SDK 34, minSdk 21
- Ran dart fix --apply for 87 automatic null-safety fixes
- Migrated flutter_map v6 API breaking changes:
  - MapOptions: center → initialCenter, zoom → initialZoom
  - layers → children structure
  - TileLayerOptions/MarkerLayerOptions/PolylineLayerOptions → TileLayer/MarkerLayer/PolylineLayer
  - Removed plugin_api.dart imports
  - Converted old plugin system (ZoomMapPlugin, AttributionPlugin, etc.) to direct widgets
  - Updated onTap callback signature: (TapPosition) → (TapPosition, LatLng)
- Migrated all marker/polyline creation to v6 API
- Fixed FlatButton → TextButton deprecation
- Fixed stackTrace access with catch(e, stackTrace) pattern
- Removed deprecated flutter_google_places_autocomplete dependency
- Removed deprecated dependencies: latlong, connectivity, launch_review
- Updated all imports from latlong → latlong2
- Placeholder implementation for places autocomplete (feature temporarily disabled)

Remaining tasks (non-blocking for build):
- Complete null-safety fixes for _location variables in genericMap.dart
- Fix theme.dart MaterialTheme parameter issues
- Fix customStepper.dart null-safety issues
- Final build and testing

lib/homePage.dart

@@ -1,14 +1,14 @@
 import 'dart:async';
 
 import 'package:comunes_flutter/comunes_flutter.dart';
-import 'package:connectivity/connectivity.dart';
+import 'package:connectivity_plus/connectivity_plus.dart';
 import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:fires_flutter/models/fireNotification.dart';
 import 'package:fires_flutter/objectIdUtils.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_redux/flutter_redux.dart';
-import 'package:flutter_simple_dependency_injection/injector.dart';
+import 'package:get_it/get_it.dart';
 import 'package:redux/redux.dart';
 
 import 'activeFires.dart';
@@ -24,7 +24,7 @@ import 'redux/actions.dart';
 class _ViewModel {
   final bool isLoaded;
 
-  _ViewModel({@required this.isLoaded});
+  _ViewModel({required this.isLoaded});
 
   @override
   bool operator ==(Object other) =>
@@ -48,7 +48,7 @@ class HomePage extends StatefulWidget {
 
 class _HomePageState extends State<HomePage> {
   final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
-  final Store<AppState> store = Injector.getInjector().get<Store<AppState>>();
+  final Store<AppState> store = GetIt.instance<Store<AppState>>();
   final Connectivity _connectivity = new Connectivity();
   final List<FireNotification> newNotifications = [];
 
@@ -104,7 +104,6 @@ class _HomePageState extends State<HomePage> {
       print("Settings registered: $settings");
     });
     _firebaseMessaging.getToken().then((String token) {
-      assert(token != null);
       // print(token);
       store.dispatch(new OnUserTokenAction(token));
       setState(() {});
@@ -302,13 +301,12 @@ class _HomePageState extends State<HomePage> {
     } catch (e) {
       debugPrint(e.toString());
     }
-    if (notif != null)
     // if our store is loaded, we just dispatch the notification, if not, we wait til is loaded
-    if (isLoaded) {
-      store.dispatch(new AddFireNotificationAction(notif));
-    } else {
-      newNotifications.add(notif);
-    }
+  if (isLoaded) {
+    store.dispatch(new AddFireNotificationAction(notif));
+  } else {
+    newNotifications.add(notif);
+  }
     return notif;
   }
 }