Provide provisions for 3PA's to persist settings/app data to the API #361
Description
Creating this from a thread in the chat.
Basically, there's no way to cover all the possible settings various third-party apps can have via distinct settings columns. Additionally, 3PAs may not currently or even want to poll the server for those and prefer to just have a place to sync their local settings for persistence or to access from another device.
Essentially, provide an authenticated endpoint a user can call that will accept a JSON POST containing the serialized app settings and a companion GET one to retrieve those.
Will leave the specific implementation details to the comments.