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* Added script to check outdated key in other translations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/backup/ui/album_info_card.dart

@@ -1,6 +1,7 @@
 import 'dart:typed_data';
 
 import 'package:auto_route/auto_route.dart';
+import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:fluttertoast/fluttertoast.dart';
@@ -37,10 +38,10 @@ class AlbumInfoCard extends HookConsumerWidget {
           visualDensity: VisualDensity.compact,
           shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(5)),
           label: const Text(
-            "INCLUDED",
+            "album_info_card_backup_album_included",
             style: TextStyle(
                 fontSize: 10, color: Colors.white, fontWeight: FontWeight.bold),
-          ),
+          ).tr(),
           backgroundColor: Theme.of(context).primaryColor,
         );
       } else if (isExcluded) {
@@ -48,10 +49,10 @@ class AlbumInfoCard extends HookConsumerWidget {
           visualDensity: VisualDensity.compact,
           shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(5)),
           label: const Text(
-            "EXCLUDED",
+            "album_info_card_backup_album_excluded",
             style: TextStyle(
                 fontSize: 10, color: Colors.white, fontWeight: FontWeight.bold),
-          ),
+          ).tr(),
           backgroundColor: Colors.red[300],
         );
       }
@@ -77,7 +78,7 @@ class AlbumInfoCard extends HookConsumerWidget {
           if (ref.watch(backupProvider).selectedBackupAlbums.length == 1) {
             ImmichToast.show(
               context: context,
-              msg: "Cannot remove the only album",
+              msg: "backup_err_only_album".tr(),
               toastType: ToastType.error,
               gravity: ToastGravity.BOTTOM,
             );
@@ -104,7 +105,7 @@ class AlbumInfoCard extends HookConsumerWidget {
                   .contains(albumInfo)) {
             ImmichToast.show(
               context: context,
-              msg: "Cannot exclude the only album",
+              msg: "backup_err_only_album".tr(),
               toastType: ToastType.error,
               gravity: ToastGravity.BOTTOM,
             );
@@ -180,7 +181,10 @@ class AlbumInfoCard extends HookConsumerWidget {
                           Padding(
                             padding: const EdgeInsets.only(top: 2.0),
                             child: Text(
-                              '${albumInfo.assetCount} ${(albumInfo.isAll ? " (ALL)" : "")}',
+                              albumInfo.assetCount.toString() +
+                                  (albumInfo.isAll
+                                      ? " (${'backup_all'.tr()})"
+                                      : ""),
                               style: TextStyle(
                                   fontSize: 12, color: Colors.grey[600]),
                             ),