Implement missing playlist endpoints

[Run1e]

https://developer.spotify.com/documentation/web-api/reference/playlists/

Missing:

• GET me/playlists
• GET users/{user_id}/playlists
• GET playlists/{playlist_id}/images
• DELETE playlists/{playlist_id}/tracks
• PUT playlists/{playlist_id}/tracks
• PUT playlists/{playlist_id}/images