Create data model for User/Organization settings #19269
Description
Users currently do not have much capabilities to express desired behaviors on PyPI.
This could further expand into Organization settings to further create some more control for Organization Admins.
A User use case is setting a language preference, which could control both the web UI (currently a cookie), and which language emails are sent to a user - see #7583 for more context.
Another use case could be "disallow creating/using API Tokens" - similar to #14300
Implementation could be either a JSONB (flexible) column on user/org models, or having another table with a one-to-many table association. I'm leaning towards exploring the JSONB approach first over another table and join.