Add context factory

Sine Striker

2023-12-07 1a1f26d9e4ab6a4fe51baa78e40c4cdf3f402bcf

 src/core/corewindowagent_p.h

@@ -16,6 +16,8 @@

        CoreWindowAgent *q_ptr; // no need to initialize

        virtual AbstractWindowContext *createContext() const;

        bool setup(QObject *host, WindowItemDelegate *delegate);

        std::unique_ptr<AbstractWindowContext> context;