Align nixAC to spice2x folder structure

src/spice2x/api/modules/card.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "api/module.h"
+#include "api/request.h"
+
+namespace api::modules {
+
+    class Card : public Module {
+    public:
+        Card();
+
+    private:
+
+        // function definitions
+        void insert(Request &req, Response &res);
+    };
+}