The new one is now built for the api jar and the old one is now internal.
It will slowly be moved around to sane places within the internal code. Most
of the features provided in the old "api" are addon specific features which
will generally rely on the main jar anyways. The new API will be specific
to compatibility features, such as blacklists, recipes, and value modification.
Instead of creating a new file for each player with their UUID as the name, we create a single file and store it all in a List. That List gets converted to a UUID -> SoulNetwork map when read from the file.
MigrateNetworkDataHandler is used to migrate players from the old system to the new one. It reads both data files and sets the LP of the new network to the LP of the old network (if the old network is larger). Once conversion is done, we delete the old file so that it doesn't happen again and overwrite player progress.
This is an API breaking change due to an import change.
