Introduces annotation based configs which can use various file formats such as yaml, json or properties. This API also supports automatic synchronization of server properties to client, all you have to do is to annotate your config field by @Configurable.Synchronized and you're done.
Just head to CurseForge and download latest mod for your version.
Then just drop the file into mods folder and you're good to go.
Just please keep in mind that this mod does nothing on it's own - it's a library mod.
For this setup please take look at Developer Wiki.
This mod will cover everything starting from 1.12.2 and newer.
However V2 version will be available only for versions starting with 1.16.5
Because these versions are quite old and not used much anymore.
Absolutely, that's the point of library mod. However keep in mind that you cannot build new versions from sources and distribute them without permission.
Look for Issues tab and report it there