Implement server-side protocol and game logic for networked command
zone play.
Protocol changes:
- room_commands.proto: command zone messages and responses
Server components:
- ServerCounter: counter synchronization for commander tax
- ServerGame: command zone game state management
- ServerPlayer: player-level command zone handling
- Server/ServerProtocolHandler: command zone message routing
- Servatrice: command zone support in the main server
Design decisions:
- setCount() returns bool for event suppression (avoid duplicate events)
- Zone state synchronized across all connected clients
- Commander tax persists across zone transitions
Test coverage verifies setCount() return value behavior for proper
event suppression in networked scenarios.
