Add basic scaffolding for translations

I still need to go through all the public string and document them.

assets/langs/en.yaml

@@ -0,0 +1 @@
+email: Email

lib/app.dart

@@ -11,6 +11,9 @@ import 'package:provider/provider.dart';
 import 'package:path/path.dart' as p;
 import 'package:flutter_runtime_env/flutter_runtime_env.dart' as runtime_env;
 
+import 'package:easy_localization/easy_localization.dart';
+import 'package:easy_localization_loader/easy_localization_loader.dart';
+
 import 'package:git_bindings/git_bindings.dart';
 
 import 'package:gitjournal/apis/git.dart';
@@ -59,7 +62,7 @@ class JournalApp extends StatelessWidget {
       appState.save(pref);
     }
 
-    runApp(ChangeNotifierProvider(
+    var app = ChangeNotifierProvider(
       create: (_) {
         return StateContainer(appState);
       },
@@ -70,6 +73,14 @@ class JournalApp extends StatelessWidget {
           return appState.notesFolder;
         },
       ),
+    );
+
+    runApp(EasyLocalization(
+      child: app,
+      supportedLocales: [const Locale('en', 'US')],
+      path: 'assets/langs',
+      useOnlyLangCode: true,
+      assetLoader: YamlAssetLoader(),
     ));
   }
 
@@ -135,6 +146,11 @@ class JournalApp extends StatelessWidget {
     return MaterialApp(
       key: const ValueKey("App"),
       title: 'GitJournal',
+
+      localizationsDelegates: EasyLocalization.of(context).delegates,
+      supportedLocales: EasyLocalization.of(context).supportedLocales,
+      locale: EasyLocalization.of(context).locale,
+
       theme: themeData,
       navigatorObservers: <NavigatorObserver>[JournalApp.observer],
       initialRoute: initialRoute,

lib/screens/settings_screen.dart

@@ -1,4 +1,6 @@
 import 'package:flutter/material.dart';
+import 'package:easy_localization/easy_localization.dart';
+
 import 'package:gitjournal/core/notes_folder_fs.dart';
 import 'package:gitjournal/screens/settings_editors.dart';
 import 'package:gitjournal/settings.dart';
@@ -91,10 +93,10 @@ class SettingsListState extends State<SettingsList> {
         key: gitAuthorEmailKey,
         style: Theme.of(context).textTheme.title,
         keyboardType: TextInputType.emailAddress,
-        decoration: const InputDecoration(
+        decoration: InputDecoration(
           icon: Icon(Icons.email),
           hintText: 'Who should author the changes?',
-          labelText: 'Email',
+          labelText: tr('email'),
         ),
         validator: (String value) {
           value = value.trim();

pubspec.lock

@@ -141,6 +141,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.16.1"
+  csv:
+    dependency: transitive
+    description:
+      name: csv
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.0.3"
   dart_git:
     dependency: "direct main"
     description:
@@ -171,6 +178,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.1"
+  easy_localization:
+    dependency: "direct main"
+    description:
+      name: easy_localization
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.1"
+  easy_localization_loader:
+    dependency: "direct main"
+    description:
+      name: easy_localization_loader
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.2"
   equatable:
     dependency: "direct main"
     description:
@@ -251,6 +272,11 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.7.4"
+  flutter_localizations:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   flutter_markdown:
     dependency: "direct main"
     description:
@@ -687,7 +713,7 @@ packages:
       name: shared_preferences
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.5.6"
+    version: "0.5.7"
   shared_preferences_macos:
     dependency: transitive
     description:
@@ -977,4 +1003,4 @@ packages:
     version: "0.0.5"
 sdks:
   dart: ">=2.7.0 <3.0.0"
-  flutter: ">=1.12.13+hotfix.4 <2.0.0"
+  flutter: ">=1.12.13+hotfix.5 <2.0.0"

pubspec.yaml

@@ -5,6 +5,8 @@ version: 1.50.0+10
 dependencies:
   flutter:
     sdk: flutter
+  flutter_localizations:
+    sdk: flutter
   intl: "^0.16.0"
   path: ^1.6.2
   uuid: ^2.0.1
@@ -52,6 +54,8 @@ dependencies:
   flutter_webview_plugin:
     git: https://github.com/breez/flutter_webview_plugin.git
   image_picker: ^0.6.6+1
+  easy_localization: ^2.2.1
+  easy_localization_loader: ^0.0.2
 
 dev_dependencies:
   flutter_launcher_icons: "^0.7.2"
@@ -71,6 +75,7 @@ flutter:
     - "assets/icon/gitlab-icon.png"
     - "assets/OnBoardingMarkdown.png"
     - "assets/OnBoardingGitProviders.png"
+    - "assets/langs/en.yaml"
   fonts:
     - family: Lato
       fonts: