Establish OIDC integration following the design implemented on the PoC

[GPortas]

Overview of the Feature Request

The PoC helped us validate the OIDC auth design. The goal now is to carry out the refined and actual implementation. Specifically, in this issue, the goal is to implement the changes related to the SPA.

Link to the PoC: #516

What kind of user is the feature intended for?
SPA users

What inspired the request?

• OIDC integration PoC #516
• Q4 milestone

What existing behavior do you want changed?

None

Any brand-new behavior do you want to add to Dataverse?

OIDC auth

Any open or closed issues related to this feature request?

#516