Implement CommandZoneMenu - context menu for interacting with cards
in the command zone.
Menu actions include:
- Cast commander (move to stack)
- Return to command zone
- View/reveal zone contents
- Commander-specific actions (tax reset, etc.)
Integration with existing menu system:
- CardMenuActionType: new action types for command zone
- CardMenu: command zone action routing
- MoveMenu: command zone as move destination
- PlayerMenu: command zone menu integration
- Zone menus: inherit from AbstractZoneMenu
This provides the right-click interaction layer for command zones.