logic: source groups for project settings

* project can not have multiple source groups with different types
* language of a project is now inferred from source groups
* setting global NameHierarchy delimiter of first sourceGroup in project
* added project settings migrations for source groups
* Add Settings Migration classes (MoveKey, DeleteKey, Lambda)
* Update sample projects with migrations
* added method to config to retrieve sublevel key names
* implemented recursive removing of keys in settings
* moved project files out of top level
* removed solution parsing code as it is not used anymore

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src/lib_gui/qt/window/project_wizzard/QtProjectWizzardContentExtensions.cpp

@@ -2,12 +2,14 @@
 
 #include <QFormLayout>
 
+#include "settings/SourceGroupSettings.h"
 #include "qt/element/QtDirectoryListBox.h"
 
 QtProjectWizzardContentExtensions::QtProjectWizzardContentExtensions(
-	std::shared_ptr<ProjectSettings> settings, QtProjectWizzardWindow* window
+	std::shared_ptr<SourceGroupSettings> settings, QtProjectWizzardWindow* window
 )
-	: QtProjectWizzardContent(settings, window)
+	: QtProjectWizzardContent(window)
+	, m_settings(settings)
 {
 }