WIP - Add system notifications for document upload progress/status

lib/features/notifications/cubit/notification_cubit.dart

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+import 'package:bloc/bloc.dart';
+import 'package:equatable/equatable.dart';
+import 'package:flutter/material.dart';
+
+part 'notification_state.dart';
+
+class NotificationCubit extends Cubit<NotificationState> {
+  NotificationCubit() : super(NotificationInitialState());
+
+  void navigateTo(String route, dynamic args) {}
+}

lib/features/notifications/cubit/notification_state.dart

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+part of 'notification_cubit.dart';
+
+abstract class NotificationState extends Equatable {
+  const NotificationState();
+
+  @override
+  List<Object> get props => [];
+}
+
+class NotificationInitialState extends NotificationState {}
+
+class NotificationOpenDocumentDetailsPageState extends NotificationState {
+  final int documentId;
+
+  const NotificationOpenDocumentDetailsPageState(this.documentId);
+}