Holistic review of non-quarkus getting-started chapter

[domhanak]

Goal
Holistic review of non-quarkus getting-started

[domhanak]

@LuboTerifaj I think I pasted wrong link here - should be what is in -> https://sonataflow-docs-preview-pr-605.surge.sh/serverlessworkflow/latest/getting-started/getting-familiar-with-our-tooling.html and same lvl chapters. Apologies

[LuboTerifaj]

@domhanak there is a different issue reported for tooling part here: #590. Why is the getting started link wrong?

[domhanak]

@LuboTerifaj The link here points to quarkus section, this is non-quarkus focused, hence the correction.
Getting-familair-with-our-tooling is part of getting started not tooling

[LuboTerifaj]

I found several issues. I provided some fixes in #651 . The rest I reported here:

• Add reference to an example with embedded execution in Java #649
• Subscriber example URL is not correct #650