v2.4.0 - Multilingual UI & Dependency Updates

Release v2.4.0\n\nChanges:\n- Added UI languages: Spanish, German, Portuguese (Brazil), Japanese, Italian, Chinese (Simplified), Russian\n- Language selector now shows native language names and is ordered alphabetically by displayed labels\n- Replaced obsolete CHECK_DEPENDENCIES scripts with UPDATE_DEPENDENCIES scripts (macOS/Windows)\n- Cleaned release package: removed obsolete CHECK_DEPENDENCIES entries and diagnostic files\n- Updated installers to copy dependency updater scripts\n\nAsset included:\n- PremierePro-AudioSeparator_v2.4.0.zip