chore(translations): add a new script to check the translation key modifications

scripts/ensure_translations_correct.dart

@@ -0,0 +1,57 @@
+// This script has one task, which is to prevent the translations from
+// being accidentally deleted, as we have more than 40 files for both the
+// arb files (source) and the dart files (the generated)
+// which make it harder to review the changes, some keys can be deleted
+// without update the generated dart files which will cause a bug/build failure
+// on the next time running the script after doing some changes to the translations
+// which make it harder to revert the changes
+
+// The script must run in the root project folder instead of the scripts folder
+
+// ignore_for_file: depend_on_referenced_packages, avoid_print
+
+import 'dart:convert';
+import 'dart:io' show File, exit;
+
+import 'package:path/path.dart' as path;
+import 'package:yaml/yaml.dart';
+
+// This must be updated once add or remove some translation keys
+// if you update existing keys, no need to update it
+const _expectedTranslationKeysLength = 96;
+
+Future<void> main(List<String> args) async {
+  final l10nYamlText = await File('l10n.yaml').readAsString();
+  final l10nYaml = loadYaml(l10nYamlText);
+  final arbDir = l10nYaml['arb-dir'];
+  final templateArbFileName = l10nYaml['template-arb-file'];
+  final templateArbFile = File(path.join(arbDir, templateArbFileName));
+  print('The file path to template arb file: ${templateArbFile.path}');
+  final templateArb =
+      jsonDecode(await templateArbFile.readAsString()) as Map<String, Object?>;
+  print(
+      'The length of the current translation keys: ${templateArb.keys.length}');
+  final newTranslationKeysLength = templateArb.keys.length;
+
+  if (newTranslationKeysLength > _expectedTranslationKeysLength) {
+    print(
+      "You have add a new keys, please update the '_expectedTranslationKeysLength' value",
+    );
+    print('$newTranslationKeysLength > $_expectedTranslationKeysLength');
+    exit(1);
+  }
+  if (newTranslationKeysLength < _expectedTranslationKeysLength) {
+    print(
+      "You have removed some keys, please update the '_expectedTranslationKeysLength' value",
+    );
+    print('$newTranslationKeysLength < $_expectedTranslationKeysLength');
+    exit(1);
+  }
+  if (newTranslationKeysLength != _expectedTranslationKeysLength) {
+    print(
+      "It's looks like you have modified the keys length without updating the `_expectedTranslationKeysLength` value",
+    );
+    print('$newTranslationKeysLength != $_expectedTranslationKeysLength');
+    exit(1);
+  }
+}