Implement import/export player data functionality

[Juansecu]

Implement the ability to import and export user data in the OpenFusion OpenAPI Plugin. This feature will allow users to easily transfer their data between instances of the plugin, or to back up their data for safekeeping. The implementation will need to be secure and reliable, and should be well-documented for users to understand how to use the feature.

It’s necessary to check what is the current version of the game, although. For doing this, it’s necessary to keep this information in mind:

1. The game versions are mostly identified by a protocol version, which is stored in the database in the Meta table, at the ProtocolVersion record
2. 0104 is beta-20100104, which is what we host on our Original/Future serve
3. 0728 is every build after that one, up to the Academy builds
4. 1013 is every Academy build (which is every build from 2011), with the last one being beta-20111013, which is what we host on our Academy server
5. Retrobution uses 0104 and its build version is beta-20200109