feat: Implement switching between accounts (multi user support), still WIP

lib/features/settings/model/global_settings.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+import 'package:hive/hive.dart';
+import 'package:paperless_mobile/core/config/hive/hive_config.dart';
+import 'package:paperless_mobile/features/settings/model/color_scheme_option.dart';
+
+part 'global_settings.g.dart';
+
+@HiveType(typeId: HiveTypeIds.globalSettings)
+class GlobalSettings with HiveObjectMixin {
+  @HiveField(0)
+  String preferredLocaleSubtag;
+
+  @HiveField(1)
+  ThemeMode preferredThemeMode;
+
+  @HiveField(2)
+  ColorSchemeOption preferredColorSchemeOption;
+
+  @HiveField(3)
+  bool showOnboarding;
+
+  @HiveField(4)
+  String? currentLoggedInUser;
+
+  GlobalSettings({
+    required this.preferredLocaleSubtag,
+    this.preferredThemeMode = ThemeMode.system,
+    this.preferredColorSchemeOption = ColorSchemeOption.classic,
+    this.showOnboarding = true,
+    this.currentLoggedInUser,
+  });
+
+  static GlobalSettings get boxedValue =>
+      Hive.box<GlobalSettings>(HiveBoxes.globalSettings).getValue()!;
+}