BaseLanguageSwitcher class abstract

Abstract base class for language switcher widgets that provides common functionality.

This class handles the state management and data flow for language switching, allowing concrete implementations to focus on UI presentation. It automatically provides access to the current locale, language switcher notifier, and supported locales.

Example usage:

class CustomLanguageSwitcher extends BaseLanguageSwitcher {
  const CustomLanguageSwitcher({super.key});

  @override
  Widget build(
    BuildContext context,
    WidgetRef ref,
    Locale state,
    LanguageSwitcherNotifier notifier,
    List<LocaleInfo> supportedLocales,
  ) {
    return ListView.builder(
      itemCount: supportedLocales.length,
      itemBuilder: (context, index) {
        final localeInfo = supportedLocales[index];
        final isSelected = state.languageCode == localeInfo.locale.languageCode;
        
        return ListTile(
          title: Text(localeInfo.displayName),
          selected: isSelected,
          onTap: () => notifier.changeLocale(localeInfo.locale),
        );
      },
    );
  }
}