Move user information to auth0

[jotjern]

This pull request does a few things to make it possible to move user data:

• Remove all columns except auth0_id from ow_user, and rename auth0_id to just id.
• Change all foreign keys on user_id to point to the new id
• Rewrite user repository to get data from auth0 instead of database
• Remove auth0 repository and auth0 synchronisation service
• Implement profile settings page to allow users to change their data
• Fix the dashboard user page to allow administrators to update user data

[linear[bot]]

DOT-817 Store user data in auth0 instead of database