🛂(frontend) redirect to the OIDC when private doc and unauthentified

[AntoLC]

Purpose

When we access a private doc and we are not connected we were getting an error message. Instead of this error message, we now redirect to the OIDC.

Proposal

• [x] 🐛(frontend) fix redirection after login
• [x] 🛂(frontend) redirect to the OIDC when private doc