refactor: organize files

CMakeLists.txt

@@ -9,7 +9,7 @@ qt_standard_project_setup()
 
 
 qt_add_executable(${AppExec}
-    src/main.cpp
+    src/gui/main.cpp
 )
 
 target_link_libraries(${AppExec} PRIVATE Qt6::Core Qt6::Widgets)

src/gui/main.cpp

@@ -0,0 +1,12 @@
+#include <QApplication>
+#include <QPushButton>
+
+int main(int argc, char **argv)
+{
+     QApplication app (argc, argv);
+
+     QPushButton button ("Hello world !");
+     button.show();
+
+     return app.exec();
+}

src/main.cpp

@@ -1,12 +0,0 @@
-#include <QApplication>
-#include <QPushButton>
-
-int main()
-{
-    QApplication app (argc, argv);
-
-    QPushButton button ("Hello world!");
-    button.show();
-
-    return app.exec();
-}