Feature request: extensible actions in the workspace row menu

[HongMing-Huang]

The Workspace Browser currently renders the per-workspace ellipsis menu with a fixed set of actions (rename and delete). There is no public client slot/API for a plugin to contribute a workspace-scoped action.

This prevents desktop integrations from adding native capabilities—such as a File management action for browsing the selected workspace directory—without using fragile DOM mutation or forking the official UI bundle.

Please expose a supported extension point for workspace-row actions:

• Plugins can register an action with id, localized label, icon, order, danger state, and callback.
• The callback receives the selected workspace identity and canonical directory path (or a safe workspace handle).
• Existing Rename/Delete actions use the same action model.
• The API is documented as stable for client plugins.

This would let downstream desktop clients add “File management” while preserving the official visual language and upgrade path.