Menu button: Support multi-screen navigation for cascading sub-menus

[twjeffery]

Description

The current menu button only supports a flat list of actions. In workspace applications, settings menus often need cascading navigation where selecting an item opens a sub-screen with further options (radio buttons, checkboxes, etc.).

This feature can currently be viewed here, click the Settings button on the top right.

For example, a "Settings" menu that lets users configure:

• Layout -> sub-screen with Table / Card / List radio options
• Columns -> sub-screen with checkboxes for column visibility
• Group by -> sub-screen with None / Status / Priority / etc.

Currently this requires building a custom popover with internal screen state management.

Expected

A way to define menu items that navigate to sub-screens, with:

• Menu items that show a label, current value, and forward chevron
• Sub-screens with a back button, title, and custom content (radio groups, checkboxes)
• A reset/clear option
• Smooth transition between screens

Screenshots

Screenshots to be attached

Spike Criteria

1. Investigate if this is possible with our current Popover component (with maybe slight changes)
2. Investigate a new component option (balancing ease of use with full features)