/*!
@class QtMvvm::CoreApp

Every QtMvvm Application needs a core application that performs the application setup and
manages the ViewModels in order to present them. If you want to use QtMvvm, you need to perform
the following steps:

1. Create a custom App class in your core project and extend QtMvvm::CoreApp
2. Implement the CoreApp::startApp method (and possibly other virtual methods)
3. In your *GUI* Project, register the App by using the #QTMVVM_REGISTER_CORE_APP macro

Simple example for a custom CoreApp:
@code{.cpp}
class MyApp : public QtMvvm::CoreApp
{
	Q_OBJECT

public:
	explicit MyApp(QObject *parent = nullptr) :
		CoreApp(parent)
	{}

protected:
	int startApp(const QStringList &arguments) override {
		show<InitialViewModel>();
		return EXIT_SUCCESS;
	}
};

//optional: overwrite the coreApp macro:
#undef coreApp
#define coreApp static_cast<MyApp*>(QtMvvm::CoreApp::instance())
@endcode

Then in the GUI project add to, for example, the `main.cpp`:
@code{.cpp}
#include "myapp.h"

QTMVVM_REGISTER_CORE_APP(MyApp)

int main(int argc, char *argv[]) {
	QApplication app(argc, argv); //registerApp() is called from here (and thus performRegistrations())

	//...

	return app.exec(); // bootApp() is called as soon as the eventloop starts (and thus startApp())
}
@endcode
*/