Moved recommendation query generation from Node to Track using the new TrackRecType enum, simplifying and centralizing platform-specific recommendation formatting. Updated related methods to use Track.get_recommendations, removed Node.get_recommendations, and improved enum handling for search platform matching. Also exposed TrackRecType in voicelink.__init__.
Standardized playlist link validation messages across all language files and code, removing specific references to Spotify and YouTube. Updated README and help view to reflect broader platform support and clarified instructions. Removed unused YouTube regex and related thumbnail logic from objects.py.
