feat: implement oidc settings api flow

[Jorgagu]

This PR have the purpose to implement the possibility to allows users setup OIDC connections through API SettingsFlow.

Related issue(s)

#3311

Checklist

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  introduces a new feature.
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Further Comments

However, all I have to do is delete the condition in [line 145 of the file selfservice/strategy/oidc/strategy_settings.go] (https://github.com/ory/kratos/blob/master/selfservice/strategy/oidc/strategy_settings.go#L145) to obtain the node link for my configured providers.

The button opens the Authorization Flow window (Google here), I've logged into my account and the window redirects to /self-service/methods/oidc/callback/google with query parameters code, state, scope...

But Kratos answers that I'm not authorized because there's no active session, since this call doesn't send the X-Session-Token header.

Now I don't know how to send my active session token obtained after the login/registration flow with the SessionTokenExchange in this OIDC method callback.

Any ideas @jonas-jonas, @vinckr ?