Docs(script): Application session script

[Milton-Ch]

Prepare

• Read PR guidelines
• Read license information

---

Description

• Added docs for application session script

closes #4704

[moabu]

shouldn't everything be in the script catalog and not here . https://github.com/JanssenProject/jans/tree/docs/application-session-script/docs/script-catalog/application_session/jans-session-audit

@ossdhaval

[ossdhaval]

@moabu

As far as I can remember, we had decided to keep the actual scripts (.java, .py) out of the navigation under docs/script-catalog and to keep only the documentation about those scripts in the navigation under docs/admin/developer/scripts.

Under docs/script-catalog, there are README.md at two levels.
One at the script type level, for instance at docs/script-catalog/introspection level(call it L1), and the other at a more granular level, for instance at docs/script-catalog/introspection/introspection-custom-parameters level(call it L2).

If there is content in the README at L1, then it should be moved under the corresponding document at docs/admin/developer/scritps so that it is part of the navigation. If there is content at L2, then it should be left as it is since that content is for a specific implementation of that script type.

I believe this was the idea when we removed the script-catalog from navigation long back. Please let me know if I am wrong.