Add Customizable Menu Toolbar Information to Jupyter Enhancements in Official CoCalc Documentation

[Blaec-CoCalc]

Is your feature request related to a problem? Please describe. Currently, the Official CoCalc Documentation lacks information about the customizable menu toolbar in Jupyter Notebooks. Users might find it challenging to fully utilize this feature without proper documentation.

Describe the solution you'd like Include a section on the customizable menu toolbar for Jupyter Notebooks in the Jupyter Enhancements page of the CoCalc Documentation: Jupyter Enhancements. Additionally, crosslink this information with the "Toolbars" section on the Getting Started page to enhance discoverability.

Describe alternatives you've considered Allow users to request documentation directly via the CoCalc platform or community forums.

Additional context: This will help users make the most out of Jupyter Notebooks by easily accessing information about customizing their menus.

Here is a video to include as well: https://vimeo.com/1006477169?share=copy#t=0