Add color blindness setting to the RP Settings providers

lib/riverpod_controllers/settings_services.dart

@@ -1,5 +1,6 @@
 import 'dart:convert';
 
+import 'package:color_blindness/color_blindness.dart';
 import 'package:flutter/material.dart';
 import 'package:logging/logging.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
@@ -198,3 +199,35 @@ class FriendicaApiTimeoutSetting extends _$FriendicaApiTimeoutSetting {
     state = value;
   }
 }
+
+@Riverpod(keepAlive: true)
+class ColorBlindnessTestingModeSetting
+    extends _$ColorBlindnessTestingModeSetting {
+  static const _colorBlindnessTestingModeKey = 'ColorBlindnessTestingMode';
+
+  @override
+  ColorBlindnessType build() {
+    ref.watch(sharedPreferencesProvider);
+    return _colorBlindnessTypeFromPrefs();
+  }
+
+  set value(ColorBlindnessType value) {
+    ref
+        .read(sharedPreferencesProvider)
+        .setString(_colorBlindnessTestingModeKey, value.name);
+    state = value;
+  }
+
+  ColorBlindnessType _colorBlindnessTypeFromPrefs() {
+    final cbString = ref
+        .read(sharedPreferencesProvider)
+        .getString(_colorBlindnessTestingModeKey);
+    if (cbString?.isEmpty ?? true) {
+      return ColorBlindnessType.none;
+    }
+    return ColorBlindnessType.values.firstWhere(
+      (c) => c.name == cbString,
+      orElse: () => ColorBlindnessType.none,
+    );
+  }
+}

lib/riverpod_controllers/settings_services.g.dart

@@ -139,5 +139,22 @@ final friendicaApiTimeoutSettingProvider =
 );
 
 typedef _$FriendicaApiTimeoutSetting = Notifier<Duration>;
+String _$colorBlindnessTestingModeSettingHash() =>
+    r'8e1d45036fdf1ce7408dcded71c591ee3d7a1e26';
+
+/// See also [ColorBlindnessTestingModeSetting].
+@ProviderFor(ColorBlindnessTestingModeSetting)
+final colorBlindnessTestingModeSettingProvider = NotifierProvider<
+    ColorBlindnessTestingModeSetting, ColorBlindnessType>.internal(
+  ColorBlindnessTestingModeSetting.new,
+  name: r'colorBlindnessTestingModeSettingProvider',
+  debugGetCreateSourceHash: const bool.fromEnvironment('dart.vm.product')
+      ? null
+      : _$colorBlindnessTestingModeSettingHash,
+  dependencies: null,
+  allTransitiveDependencies: null,
+);
+
+typedef _$ColorBlindnessTestingModeSetting = Notifier<ColorBlindnessType>;
 // ignore_for_file: type=lint
 // ignore_for_file: subtype_of_sealed_class, invalid_use_of_internal_member, invalid_use_of_visible_for_testing_member