Add Turkish localization (#23)

* feat: add turkish .arb file and generate strings

* refactor: improve handling of hardcoded localizations

* refactor: remove useless usePathUrlStrategy

* docs: add Turkish to supported languages

* docs: add credits for localizations and contributing section to README

* fix: wrong locale in locale check for hardcoded strings

* style: remove prints

* docs: add localization section to new CONTRIBUTING.md

* feat: add missing hardcoded localization

CONTRIBUTING.md

@@ -0,0 +1,10 @@
+# Contributing
+
+## Localization
+
+In order to improve or add support for a language, please follow these steps:
+
+- Localized strings can be found in two different places:
+  - The `app_XX.arb` file located in [`lib/l10n`](lib/l10n) (where `XX` corresponds to the language code), that contains the vast majority of all strings. Please make sure that you do not localize any parameter name (ex: `{parameter}`) and that you do escape single quotes (ex: `I''m ok` instead of `I'm ok`).
+  - The [`hardcoded_localizations.dart`](lib/l10n/hardcoded_localizations.dart), that contains a few specific strings that need to be hardcoded.
+- Localized strings can be generated with the `flutter gen-l10n` command. Check that the [`unstranslated.txt`](lib/l10n/untranslated.txt) file is empty, otherwise it will indicate which strings you did not translate.

README.md

@@ -68,15 +68,26 @@ See more screenshots [here](assets/screenshots).
 
 ## Supported languages
 
-- English: 100%
-- French: 100%
+- English
+- French
+- Turkish
+
+To improve or add support for a language, please see [CONTRIBUTING.md](CONTRIBUTING.md#localization).
 
 ## Credits
 
 - [Material Design Icons](https://github.com/google/material-design-icons) for the [notes](https://fonts.google.com/icons?selected=Material+Symbols+Outlined:notes) icon used for the logo.
 - [Material Files](https://github.com/zhanghai/MaterialFiles) for the general design inspiration, and especially the logo and its color.
 - [Simplenote](https://simplenote.com) for the general layout of the app and its basic features.
 
+### Localization
+
+- Turkish: [xe1st](https://github.com/xe1st).
+
+## Contributing
+
+Please see [CONTRIBUTING.md](CONTRIBUTING.md).
+
 ---
 
 ## Enhancements

lib/l10n/app_localizations.g.dart

@@ -7,6 +7,7 @@ import 'package:intl/intl.dart' as intl;
 
 import 'app_localizations_en.g.dart';
 import 'app_localizations_fr.g.dart';
+import 'app_localizations_tr.g.dart';
 
 /// Callers can lookup localized strings with an instance of AppLocalizations
 /// returned by `AppLocalizations.of(context)`.
@@ -88,7 +89,7 @@ abstract class AppLocalizations {
   ];
 
   /// A list of this localizations delegate's supported locales.
-  static const List<Locale> supportedLocales = <Locale>[Locale('en'), Locale('fr')];
+  static const List<Locale> supportedLocales = <Locale>[Locale('en'), Locale('fr'), Locale('tr')];
 
   /// No description provided for @app_name.
   ///
@@ -658,7 +659,7 @@ class _AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations>
   }
 
   @override
-  bool isSupported(Locale locale) => <String>['en', 'fr'].contains(locale.languageCode);
+  bool isSupported(Locale locale) => <String>['en', 'fr', 'tr'].contains(locale.languageCode);
 
   @override
   bool shouldReload(_AppLocalizationsDelegate old) => false;
@@ -671,6 +672,8 @@ AppLocalizations lookupAppLocalizations(Locale locale) {
       return AppLocalizationsEn();
     case 'fr':
       return AppLocalizationsFr();
+    case 'tr':
+      return AppLocalizationsTr();
   }
 
   throw FlutterError('AppLocalizations.delegate failed to load unsupported locale "$locale". This is likely '