Documentation: Add the previously deleted section on "Advanced rule actions with conditional and named consequences" to current documentation

[JaredDavis22]

Would it be acceptable to add this section back to the main documentation?

Why was it removed?

https://docs.drools.org/7.44.0.Final/drools-docs/html_single/#:~:text=4.1.9.3.%20Advanced%20rule%20actions%20with%20conditional%20and%20named%20consequences

(I am willing todo a PR, just want to make sure adding it back is acceptable)

[JaredDavis22]

another? version of the same section:

https://docs.drools.org/7.74.1.Final/drools-docs/html_single/index.html#drl-rules-THEN-advanced-con_drl-rules

[tkobayas]

@JaredDavis22 Thank you for raising this issue.

In the next version docs, Advanced rule actions with conditional and named consequences section will be back.

If you build the current main branch,

cd drools-docs
mvn clean install

Open ./target/website/docs/index.html with a browser. You will find Rule Language Reference (Traditional) chapter and Advanced rule actions with conditional and named consequences section in it.

[tkobayas]

For RuleUnit, it seems to work, but need to add unit tests and documentation in Rule Language Reference chapter. Filed https://github.com/apache/incubator-kie-drools/issues/6038

[tkobayas]

In the next version docs, Advanced rule actions with conditional and named consequences section will be back.

When the next version docs will be published, I'll close this issue.