add balancing tool target

src/balancing/BalancingWindow.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <memory>
+#include <thread>
+#include <vector>
+
+#include <QTimer>
+#include <QWidget>
+
+#include "ArenaButton.h"
+#include "ArenaSimulation.h"
+#include "BalancingConfig.h"
+#include "GameConfig.h"
+
+class BalancingWindow : public QWidget
+{
+    Q_OBJECT
+
+public:
+    BalancingWindow(const BalancingConfig& balancingConfig,
+                    const GameConfig& gameConfig,
+                    QWidget* parent = nullptr);
+    ~BalancingWindow() override;
+
+private slots:
+    void pollStatuses();
+
+private:
+    struct ArenaEntry
+    {
+        std::unique_ptr<ArenaSimulation> simulation;
+        std::thread worker;
+        ArenaButton* button;
+    };
+
+    std::vector<ArenaEntry> m_arenas;
+    QTimer* m_pollTimer;
+};