This belongs to the OAuth Epic: #4004 - please read this for the big picture of what this issue is for :)

Add the following columns to the already existing client table to enable more OAuth features:

• client_id
  • unique id of the client, UUID could be used for that?
• redirection_uri (URI used to redirect after authentication attempt)
• trusted_domains
  • if we want to allow more than one trusted domain per client we would need another table for 1:n relations
• logo (URL with the logo of a client)
• status (development/enabled/disabled)
• type (Values: Web Server, Installed App, Client-Side, Ghost Admin)
• description

This issue includes creating a new migration to the next database version.