Improve the documentation to report the refresh token workflow part

[offtherailz]

Description

Update the documentation due to these changes, improving the chart of https://github.com/geosolutions-it/MapStore2/blame/master/docs/developer-guide/integrations/auth.md with refresh token request to the service.

Note: now they are converted in images. To generate images, restore old markdown and export.

https://github.com/geosolutions-it/MapStore2/blame/master/docs/developer-guide/integrations/auth.md

See this orzih/mkdocs-with-pdf#34

Notice:

Now charts are rendered like this:

Involved changes to document

Beta Give feedback

1. OIDC okta testing geostore#386
   C039-2024-HALLIBURTON-SUPPORT +1
   
2. Improvements with OKTA OIDC provider integration geostore#385
   C039-2024-HALLIBURTON-SUPPORT +1
   

Documentation section involved

• User Guide
• Developer Guide

Other useful information