Refactor localization keys for "neighbors" terminology across multiple languages

- Updated localization keys from "neighbours" to "neighbors" in the following files:
  - app_localizations_bg.dart
  - app_localizations_de.dart
  - app_localizations_en.dart
  - app_localizations_es.dart
  - app_localizations_fr.dart
  - app_localizations_it.dart
  - app_localizations_nl.dart
  - app_localizations_pl.dart
  - app_localizations_pt.dart
  - app_localizations_ru.dart
  - app_localizations_sk.dart
  - app_localizations_sl.dart
  - app_localizations_sv.dart
  - app_localizations_uk.dart
  - app_localizations_zh.dart
- Updated corresponding ARB files to reflect the changes in keys.
- Renamed the NeighboursScreen to NeighborsScreen in the chat and repeater hub screens for consistency.

lib/l10n/app_localizations_pt.dart

@@ -1678,11 +1678,10 @@ class AppLocalizationsPt extends AppLocalizations {
   String get repeater_cliSubtitle => 'Enviar comandos ao repetidor';
 
   @override
-  String get repeater_neighbours => 'Vizinhos';
+  String get repeater_neighbors => 'Vizinhos';
 
   @override
-  String get repeater_neighboursSubtitle =>
-      'Visualizar vizinhos de salto zero.';
+  String get repeater_neighborsSubtitle => 'Visualizar vizinhos de salto zero.';
 
   @override
   String get repeater_settings => 'Configurações';
@@ -2381,7 +2380,7 @@ class AppLocalizationsPt extends AppLocalizations {
   }
 
   @override
-  String get neighbors_repeatersNeighbours => 'Repetidores Vizinhos';
+  String get neighbors_repeatersNeighbors => 'Repetidores Vizinhos';
 
   @override
   String get neighbors_noData => 'Não estão disponíveis dados de vizinhos.';