add folia support please

[Alienn-Know]

[NathanWolf]

Can you expand? What does this mean?

If Folia is a plugin, please provide a link to it and describe how you think EffectLib would support it or integrate with it.

[PikaMug]

Folia is work-in-progress server software from the folks at PaperMC which adds multithreading, with the tradeoff being plugins using the Bukkit scheduler need to be updated for compatibility. This entails adding a flag to plugin.yml and using a library like FoliaLib for scheduled tasks (without it, you'd have to make a separate release just for Folia servers).

Considering the software is 1.19-1.20.4 atm and isn't particularly useful to anyone without a large player base (as in hundreds of players), I don't see much point in adding support. Should be pretty straightforward if that changes, though.