implement ship modules

src/lib/sim/ShipLayout.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include <QPoint>
+
+#include "Rotation.h"
+
+// A single module placed on a ship's layout grid (REQ-MOD-PLACEMENT).
+struct PlacedModule
+{
+    std::string moduleId;
+    QPoint position;
+    Rotation rotation;
+};
+
+// The complete module configuration for a shipyard's current ship (REQ-MOD-CONFIG).
+struct ShipLayoutConfig
+{
+    std::vector<PlacedModule> placedModules;
+};