Describe the request

In other editors there are sidebars with a function list of the file, not in Arduino 1.x nor 2.x
I would love to have some, it is annoying to scroll and search each time to the function I want to jump to and back etc.
There are no bookmarks neither to make jumping easier.

Describe the current behavior

No sidebar for functions, no bookmarks available. Scrolling is a pain in the glass.

Arduino IDE version

2.0.0-rc8

Operating system

Windows

Operating system version

10

Additional context

I have this feature in eclipse (since long) where it is called "Outline", I have it in Notepad++ where it is called Function List.
Many editors have it but not all. It is very useful.

Issue checklist

• I searched for previous requests in the issue tracker
• I verified the feature was still missing when using the latest nightly build
• My request contains all necessary details