[Feature Request]: Nested Playlist or Playlist Folders to better organize playlists

[CoolMojo]

Scope

GUI

What problem

The playlist section of my airsonic-advanced implementation is starting to get a bit cluttered over time - especially as my library grows and users create and share more and more playlists. While I could probably do with a clean up, it would be great if I could just have a better way to organize them.

Feature

Either a folder, grouped/labeled or nested playlist structure that would allow for playlists to be organized - similar to the way that iTunes (sorry - best example I could think of) had a folder structure for playlists way back in the day: https://support.apple.com/en-ca/guide/music/musb6032bb56/mac

Again - apologies for the iTunes reference.

I know there are probably bigger items on the list, but just thought I'd throw this out there as a suggestion. Happy to clarify if my request is in any way unclear.

Thank you for keeping airsonic alive!