Review of MapStore's Developer Guide for Spring 7

[tdipisa]

Description

Following the Spring 7 upgrade, we need to review the DEV guide to ensure relevant parts are aligned with this ugrade (e.g. the OIDC part).

Documentation section involved

• User Guide
• Developer Guide

Other useful information

More info about contributed changes for the OIDC part are available in here.

[offtherailz]

#12428 Already updates with this commit the dev documentation. Therefore @tdipisa I'm going to connect this issue to the PR, as it will be closed by it too