Feature: AzureAD/EntraID Broker Example / Guide

### Is there an existing request for this feature?

- [X] I have searched the existing issues and found none that matched mine

### Describe the problem

I am finding it hard to build my own Broker for AzureAD following the instructions from the exaple broker.

What URLs should I be using
What DBus should I create
Where do the App_ID, App_Secret and Tenant_ID go (Should I use App_ID/App_Secret or Client_ID/Client_Secret)

Also is the secret actually required because I used the old PAM setup with just App_ID and Tenant_ID and authentication actually worked on 24.04 and 22.04 but I had issues to run Sudo.

I found online that the sudo issue is already resolved on the authd setup but I cannot for the life of me figure out what I need to do after successfully installing authd.

Review the existing AzureAD example broker and authd installation guidance first, then trace the setup details for URLs, D-Bus objects, application credentials, and sudo behavior. Done means a guide clearly explains the required AzureAD/EntraID values, whether a secret is needed, and the steps after installing authd.

Written by the indexing model from the issue text.