Optionally send client arrays for multi-value items

[CDrummond]

Currently LMS sends all multi-value items (artists, artist_ids, etc.) as a string of comma-separated values. Perhaps if client sends a setting in "tags" then these items should be supplied as arrays to client? "H" or "h" seem to be available in "songinfo"

This is as discussed in the LMS forums - https://forums.slimdevices.com/forum/user-forums/3rd-party-software/106269-announce-material-skin?p=1660581#post1660581 Issue raised so its not forgotten. Not a high priority, but a nice to have. I've made initial changes to LMS to check if a value is an array or not - but have not updated "tags:" to use "H" or "h", as that depends on whether that would be used.

[github-actions[bot]]

:warning: This issue is stale because it has been open for 720 days with no activity. Please chime in if you want to keep it alive.

[CDrummond]

I still think this would be a good idea. Especially with multi-artist tags- currently there's a regex to handle this., but an array of values would be cleaner/safer.