Add Sleep Timer controls to API (e.g. for tasker)

Feature description:

I would like to see the Sleep Timer controls available in the Symfonium API

Problem solved:

the Symfonium API already allows me to launch music playlists via Tasker intents,
however, activating the Sleep Timer can only be done manually, which is tedious and defeats the purpose of the automation.

Brought benefits:

reduces friction to falling asleep listening to beautiful music

Additional description and context:

currently with API we can control playback e.g. shuffle, repeat, mute, togglemute etc…
but for some reason we cannot control the sleep timer

Will be in next release.

that’s great - looking forward to it