Intra V3 support

[Dmusulas]

Is your feature request related to a problem? Please describe. Many campuses rolled out Profile V3 or Intra V3 lately, which at least from my testing and understanding is unsupported by this extension. Extension simply tries to authenticate and gets redirected back to profile.intra.fr and none of the features are applied. However, it only affects profile subdomain, other pages seem to be behaving as usual (i.e. dark theme is applied).

Describe the solution you'd like First of all I would like to open a discussion whether this extension can be adopted to support profiles of intra v3 or should it be forked. Furthermore, I am happy to contribute to this project to adapt it to intra v3.

Describe alternatives you've considered A simple alternative would reverting profiles back Intra V2 however this is unsupported currently at my campus. Also, it does not seem like a good long term solution.