[Code Cleanup] Cleaned up some header files and move a bit of debugging logic to cmake (#7677)

* Renamed lmms_basics.h to LmmsTypes.h and scoped it down for that purpose.

* Shifted the LMMS_STRINGIFY macro to it's own header.

* Removed the debug.h header file and use cmake to handle the macro logic.

* Remove some unused headers and include directives

plugins/AudioFileProcessor/AudioFileProcessor.cpp

@@ -30,7 +30,7 @@
 #include "SampleLoader.h"
 #include "Song.h"
 
-#include "lmms_basics.h"
+#include "LmmsTypes.h"
 #include "plugin_export.h"
 
 #include <QDomElement>