[Feature Request]: Add a Toggle Button to Hide the Drawing Toolbar in Split View

Description:

When using Excalidraw in a split-screen view, the drawing toolbar takes up significant space, limiting the workspace. It would be helpful to have a button that can hide or toggle the visibility of the drawing toolbar.

Steps to Reproduce:

1. Open Excalidraw in a split-screen view (e.g., alongside another app/browser).
2. Observe that the drawing toolbar takes up a large portion of the screen without an option to hide it.

Expected Behavior:

A toggle button to hide and show the drawing toolbar should be available to improve the screen space.

Actual Behavior:

The drawing toolbar remains open, limiting the workspace in split view.

Screenshot:

Additional Context:

This feature would enhance usability, especially for users working with limited screen space.