Open/Close left side panel

[Ovgodd]

Feature Request

Is your feature request related to a problem or unsupported use case? Please describe.
When viewing a document or a sub-document, the left side panel should be explicitly controllable by the user.

Describe the solution you'd like
Allow the left side panel to be opened and closed via a simple toggle button displayed in a floating bar at the top of the document.

Do you want to work on it through a Pull Request?
Yes

https://www.figma.com/design/qdCWR4tTUr7vQSecEjCyqO/Docs?node-id=11973-32903&t=hAR9zsROwR5LZxZm-0