WorldPickerService class

A comprehensive service for managing and querying world country data.

This service provides static methods to access country information, search and filter countries by various criteria, and retrieve related geographical and cultural data.

All methods are optimized with caching for better performance. The country data includes all 195 UN-recognized countries with complete metadata including flags, currencies, languages, and more.

Example usage:

// Get a specific country
Country? brazil = WorldPickerService.fromIsoCode('BR');

// Search countries
List<Country> results = WorldPickerService.fromCountryName('united');

// Get all countries in a continent
List<Country> europeanCountries = WorldPickerService.fromContinentCode('EU');