[Game] Add Command Zone support with commander tax tracking

- Add CommandZone and CommandZoneLogic for commander
  - Add CommanderTaxCounter
  - Add counter active state protocol (show/hide tax counters)
  - Add "Enable Command Zone" option in game creation dialogs
  - Add context menu actions for command zone operations

Took 9 minutes

Took 11 minutes

cockatrice/src/game/zones/command_zone_logic.h

@@ -0,0 +1,51 @@
+/**
+ * @file command_zone_logic.h
+ * @ingroup GameLogicZones
+ * @brief Logic layer for the command zone, used for Commander format.
+ */
+
+#ifndef COCKATRICE_COMMAND_ZONE_LOGIC_H
+#define COCKATRICE_COMMAND_ZONE_LOGIC_H
+#include "card_zone_logic.h"
+
+/**
+ * @class CommandZoneLogic
+ * @brief Logic layer for managing cards in the command zone.
+ *
+ * Handles data storage and card management for the command zone in Commander format.
+ * Supports ordered card insertion for drag-and-drop operations.
+ *
+ * @see CommandZone for the graphics layer
+ * @see CardZoneLogic
+ */
+class CommandZoneLogic : public CardZoneLogic
+{
+    Q_OBJECT
+public:
+    /**
+     * @brief Constructs a CommandZoneLogic instance.
+     * @param _player The player who owns this zone
+     * @param _name Zone name (ZoneNames::COMMAND)
+     * @param _hasCardAttr Whether cards in this zone have attributes
+     * @param _isShufflable Whether the zone can be shuffled
+     * @param _contentsKnown Whether the zone contents are public knowledge
+     * @param parent Parent QObject
+     */
+    CommandZoneLogic(PlayerLogic *_player,
+                     const QString &_name,
+                     bool _hasCardAttr,
+                     bool _isShufflable,
+                     bool _contentsKnown,
+                     QObject *parent = nullptr);
+
+protected:
+    /**
+     * @brief Adds a card at position x (y ignored). Appends if x is -1 or out of range.
+     * @param card Card to add
+     * @param x Insertion index, or -1 to append
+     * @param y Unused
+     */
+    void addCardImpl(CardItem *card, int x, int y) override;
+};
+
+#endif // COCKATRICE_COMMAND_ZONE_LOGIC_H