Internationalization (German) of the mobile app. (#246)

* Add i18n framework to mobile app and write simple translation generator

* Replace all texts in login_form with i18n keys

* Localization of sharing section

* Localization of asset viewer section

* Use JSON as base translation format

* Add check for missing/unused translation keys

* Add localizely

* Remove i18n directory in favour of localizely

* Backup Translation

* More translations

* Translate home page

* Translation of search page

* Translate new server version announcement

* Reformat code

* Fix typo in german translation

* Update englisch translations

* Change translation keys to match dart filenames

* Add /api to translated endpoint_urls

* Update localizely.yml

* Add languages to ios plist

* Remove unused keys

* Added script to check outdated key in other translations

* Add download key to localizely.yml

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/modules/home/ui/control_bottom_app_bar.dart

@@ -1,3 +1,4 @@
+import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:immich_mobile/modules/home/ui/delete_diaglog.dart';
 
@@ -26,7 +27,7 @@ class ControlBottomAppBar extends StatelessWidget {
                 children: [
                   ControlBoxButton(
                     iconData: Icons.delete_forever_rounded,
-                    label: "Delete",
+                    label: "control_bottom_app_bar_delete".tr(),
                     onPressed: () {
                       showDialog(
                         context: context,

mobile/lib/modules/home/ui/daily_title_text.dart

@@ -1,3 +1,4 @@
+import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/modules/home/providers/home_page_state.provider.dart';
@@ -19,7 +20,7 @@ class DailyTitleText extends ConsumerWidget {
     var currentYear = DateTime.now().year;
     var groupYear = DateTime.parse(isoDate).year;
     var formatDateTemplate =
-        currentYear == groupYear ? 'E, MMM dd' : 'E, MMM dd, yyyy';
+        currentYear == groupYear ? "daily_title_text_date".tr() : "daily_title_text_date_year".tr();
     var dateText =
         DateFormat(formatDateTemplate).format(DateTime.parse(isoDate));
     var isMultiSelectEnable =

mobile/lib/modules/home/ui/delete_diaglog.dart

@@ -1,3 +1,4 @@
+import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/shared/providers/asset.provider.dart';
@@ -13,18 +14,17 @@ class DeleteDialog extends ConsumerWidget {
     return AlertDialog(
       backgroundColor: Colors.grey[200],
       shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
-      title: const Text("Delete Permanently"),
-      content: const Text(
-          "These items will be permanently deleted from Immich and from your device"),
+      title: const Text("delete_dialog_title").tr(),
+      content: const Text("delete_dialog_alert").tr(),
       actions: [
         TextButton(
           onPressed: () {
             Navigator.of(context).pop();
           },
           child: const Text(
-            "Cancel",
+            "delete_dialog_cancel",
             style: TextStyle(color: Colors.blueGrey),
-          ),
+          ).tr(),
         ),
         TextButton(
           onPressed: () {
@@ -36,9 +36,9 @@ class DeleteDialog extends ConsumerWidget {
             Navigator.of(context).pop();
           },
           child: Text(
-            "Delete",
+            "delete_dialog_ok",
             style: TextStyle(color: Colors.red[400]),
-          ),
+          ).tr(),
         ),
       ],
     );

mobile/lib/modules/home/ui/monthly_title_text.dart

@@ -1,3 +1,4 @@
+import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 
@@ -11,7 +12,7 @@ class MonthlyTitleText extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var monthTitleText = DateFormat('MMMM y').format(DateTime.parse(isoDate));
+    var monthTitleText = DateFormat("monthly_title_text_date_format".tr()).format(DateTime.parse(isoDate));
 
     return SliverToBoxAdapter(
       child: Padding(

mobile/lib/modules/home/ui/profile_drawer.dart

@@ -1,4 +1,5 @@
 import 'package:auto_route/auto_route.dart';
+import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_hooks/flutter_hooks.dart';
 import 'package:hive_flutter/hive_flutter.dart';
@@ -183,12 +184,12 @@ class ProfileDrawer extends HookConsumerWidget {
                   color: Colors.black54,
                 ),
                 title: const Text(
-                  "Sign Out",
+                  "profile_drawer_sign_out",
                   style: TextStyle(
                       color: Colors.black54,
                       fontSize: 14,
                       fontWeight: FontWeight.bold),
-                ),
+                ).tr(),
                 onTap: () async {
                   bool res =
                       await ref.watch(authenticationProvider.notifier).logout();
@@ -227,7 +228,7 @@ class ProfileDrawer extends HookConsumerWidget {
                       child: Text(
                         serverInfoState.isVersionMismatch
                             ? serverInfoState.versionMismatchErrorMessage
-                            : "Client and Server are up-to-date",
+                            : "profile_drawer_client_server_up_to_date".tr(),
                         textAlign: TextAlign.center,
                         style: TextStyle(
                             fontSize: 11,