Save files versioning

[WilliamKarolDiCioccio]

I was thinking to start versioning our save files as the app may face changes to the save formats as we add features. By doing so we would then be able to properly convert users data without losing any chat or settings with updates

[Rossi1337]

I agree otherwise you may run into issues after upgrading the app.
I would do the following.

• Write the sessions to json files instead of storing them into a Hive DB.
• Write them into the "applications data" folder instead of the users "documents" folder
• Add a version number to the json files so we can upgrade them later if we have structural changes.

[WilliamKarolDiCioccio]

Technically speaking we're already using the JSON format under the hood with Hive, as you can see ChatSessionWrapper is in fact a JSON convertible. We can just add a metadata object that would contain the 'version' field and some along with some other infos allowing us to achieve the same result but keeping users data protected as Hive provides a basic form of encryption by default (we might even upgrade to something like sha-256 in the future). Coming to the second point, I strongly agree with you, we must move sessions to the app data folder.