v0.5.0

• Added lazy per-language translation loading to reduce initial bundle size;
• Added loadLanguage API to preload translations on demand;
• Added dual ESM/CJS build output via tsup for better bundler compatibility;
• Improved search responsiveness with input debounce;
• Improved scroll smoothness on country list and alphabet letter jumps;
• Unified PopupModal and FullscreenModal into a single StaticModal component;
• Extracted CountriesList and shared hooks for cleaner architecture;
• Renamed getContriesDependents to getCountriesDependents (typo fix);
• Changed getCountriesByName to async to support lazy translations (breaking);
• Fixed typo in Tanzania French translation;
• Updated lib documentation.