[KSW-Guides] How to (?) Serverless Workflow Editor

This is a placeholder for a JIRA to add a guide about using our SW Editor. Feel free to convert it into an EPIC or break it into small JIRAs to cover all the aspects you guys want to cover.

Here's the dedicated directory: https://github.com/kiegroup/kogito-docs/tree/main/serverlessworkflow/modules/ROOT/pages/tooling

Please remember that you can create other directories, pages, or whatever content you feel needed.