[FEATURE]: Frontend access and refresh token

[cv5ch]

Description

Handle access and refresh token in the frontend once implemented by the server:

• auth/token endpoint now returns access and refresh token: Consider how to store them (e.g. access token only in memory and refresh token in HTTPOnly Cookie)
• Attach access token to resource requests and refresh token to auth/refresh requests.
• Refresh the access token if it is about to expire or expired by calling auth/refresh with the attached refresh token and save new refresh token.
• Add functionality to revoke refresh tokens of users by an admin
• Optionally if server implements it: Make lifetime of tokens configurable by admins maybe in a certain range

Needs #1526