TODO.md

• Add unit tests
• Document the local testing workflows
• Handle playlist renames seamlessly
  • Use playlist IDs as file names
    • Fix spotify playlist publisher
• Use "aliases" as source of truth for playlist IDs
• Splitting by " | " breaks for some tracks
• Clean up near-duplicates in cumulative playlists
• Automatically add all "Spotify" user playlists
• Only fetch each track once (same track in multiple playlists)
• Link to published cumulative playlists where possible