Add support for 18 additional languages

[rpock]

Add Localization Support for 18 New Languages

Added Languages:

European Languages	Asian Languages	Other
🇮🇹 Italian (IT)	🇯🇵 Japanese (JA)	🇮🇳 Hindi (HI)
🇸🇮 Slovenian (SL)	🇰🇷 Korean (KO)
🇭🇷 Croatian (HR)
🇫🇷 French (FR)
🇵🇱 Polish (PL)
🇸🇰 Slovak (SK)
🇨🇿 Czech (CS)
🇧🇦 Bosnian (BS)
🇷🇸 Serbian (SR)
🇹🇷 Turkish (TR)
🇺🇦 Ukrainian (UK)
🇸🇪 Swedish (SV)
🇳🇴 Norwegian (NO)
🇭🇺 Hungarian (HU)
🇳🇱 Dutch (NL)

Implementation Details:

• ✅ Created language-specific localization files for each new language
• ✅ Updated the supported locales list in croppy_localizations.dart
• ✅ Added corresponding exports in _l10n.dart
• ✅ Updated the lookupCroppyLocalizations function

This PR significantly expands the international reach of the Croppy package, making it more accessible to users worldwide.

[AndrewDongminYoo]

I am a Flutter developer developing an app using the croppy package in Korea. The Korean translations mentioned here are generally excellent, and I hope this PR will be merged soon!

// 🐦 Flutter imports:
import 'package:flutter/widgets.dart';

// 📦 Package imports:
import 'package:croppy/croppy.dart';

class CamiCroppyLocalizations extends LocalizationsDelegate<CroppyLocalizations> {
  const CamiCroppyLocalizations();
  @override
  bool isSupported(Locale locale) => ['ko', 'en'].contains(locale.languageCode);

  @override
  Future<CroppyLocalizations> load(Locale locale) async {
    switch (locale.languageCode) {
      case 'ko':
        return CroppyLocalizationsKo();
      case 'en':
        return CroppyLocalizationsEn();
    }
    return lookupCroppyLocalizations(locale);
  }

  @override
  bool shouldReload(CamiCroppyLocalizations old) => false;
}

class CroppyLocalizationsKo extends CroppyLocalizations {
  CroppyLocalizationsKo() : super('ko');
  @override
  String get saveLabel => '저장';
  @override
  String get doneLabel => '완료';
  @override
  String get cancelLabel => '취소';

  @override
  String get cupertinoFreeformAspectRatioLabel => '자유 비율';
  @override
  String get cupertinoOriginalAspectRatioLabel => '원본';
  @override
  String get cupertinoResetLabel => '초기화';
  @override
  String get cupertinoSquareAspectRatioLabel => '정사각형';

  @override
  String materialGetFlipLabel(LocalizationDirection direction) {
    switch (direction) {
      case LocalizationDirection.horizontal:
        return '가로로 뒤집기';

      case LocalizationDirection.vertical:
        return '세로로 뒤집기';
    }
  }

  @override
  String get materialFreeformAspectRatioLabel => '자유 비율';
  @override
  String get materialOriginalAspectRatioLabel => '원본';
  @override
  String get materialResetLabel => '초기화';
  @override
  String get materialSquareAspectRatioLabel => '정사각형';
}