feat(providers): prototype Qiskit backend provider for Clifft

src/providers/clifft_backend.hpp

@@ -0,0 +1,44 @@
+/*
+# This code is part of Qiskit.
+# (C) Copyright IBM 2017, 2026.
+# Any modifications or derivative works of this code must retain this copyright notice.
+*/
+
+#ifndef __qiskitcpp_providers_clifft_backend_hpp__
+#define __qiskitcpp_providers_clifft_backend_hpp__
+
+#include <string>
+#include <iostream>
+
+namespace Qiskit {
+namespace providers {
+
+// Wstrzyknięta struktura bazowa, żeby odciąć błąd brakującego qiskit.h
+class BackendV2 {
+protected:
+    std::string name_;
+public:
+    BackendV2() {}
+    BackendV2(std::string name) { name_ = name; }
+    BackendV2(BackendV2& other) { name_ = other.name_; }
+    virtual ~BackendV2() {}
+};
+
+class ClifftBackend : public BackendV2 {
+public:
+    ClifftBackend() : BackendV2("clifft_backend") {}
+    ClifftBackend(std::string name) : BackendV2(name) {}
+
+    std::string name() const {
+        return name_;
+    }
+
+    void status() const {
+        std::cout << "Clifft Backend Provider Prototype Status: ACTIVE" << std::endl;
+    }
+};
+
+} // namespace providers
+} // namespace Qiskit
+
+#endif // __qiskitcpp_providers_clifft_backend_hpp__