[WIP] Add option for outline auto-expanded or flat-style

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

---

This section details on the original issue you should resolve

<issue_title>[feature request] outline auto-expanded or flat-style</issue_title>
<issue_description>At the moment the outline elements are all collapsed when you open a script file. That kind of negates the purpose of having a quick overview of what is happening in the file.

Could you add a setting so that it is automatically expanded?
Or a flat-style list instead of nested list?</issue_description>

Comments on the Issue (you are @copilot in this section)

@RykoTheDev Sure, i'll add option to switch between nested and flat styled soon