refactor: improve locale parsing and normalization in localization ge… (#3330)

* refactor: improve locale parsing and normalization in localization generation script

* Remove chinese tranditional because it's breaking flutter

* delete retry in case of parallel save [skip ci]

* Improve translation

lib/entities/language_service.dart

@@ -20,7 +20,6 @@ class LanguageService {
     'ru': 'Русский (Russian)',
     'uk': 'Українська (Ukrainian)',
     'zh': '简体中文 (Chinese Simplified)',
-    'zh_TW': '繁體中文 (Chinese Traditional)',
     'hr': 'Hrvatski (Croatian)',
     'it': 'Italiano (Italian)',
     'th': 'ภาษาไทย (Thai)',
@@ -55,7 +54,6 @@ class LanguageService {
     'ru': 'rus',
     'uk': 'ukr',
     'zh': 'chn',
-    'zh_TW': 'twn',
     'hr': 'hrv',
     'it': 'ita',
     'th': 'tha',