OIDC dashboard provider detection on runtime #186
Description
Currently we only advice to use the generic oidc endpoint of nuxt-oidc-auth but this does not work with e.g entra due to a different token design in the azure entra id challenges.
Therfore we should advice the user to configure the oidc authentication according to the nuxt-oidc-auth documentation (for one provider only!!!) and introduce a new public nuxt variable which tells the dashboard which provider is actually in use at the moment. This allows us to use the custom implementations of the oidc auth plugin.